diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index b9ae99d..28b461b 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -49,3 +49,19 @@ jobs:
       - name: Test validate.py directory layout rules
         run: ./test-validate-py.sh
 
+      # Needs GameplanePanel/Gameplane PR #668 (i18n-check --module) merged
+      # into master first; until then this step cannot resolve the tool.
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.26"
+
+      - name: Check module locales
+        run: |
+          set -euo pipefail
+          for dir in */; do
+            dir="${dir%/}"
+            [ -d "$dir/locales" ] || continue
+            echo ">> i18n-check $dir"
+            go run github.com/GameplanePanel/gameplane/i18n/cmd/i18n-check@master \
+              --module "$dir/template.yaml" "$dir/locales"
+          done
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a85bc70
--- /dev/null
+++ b/README.md
@@ -0,0 +1,20 @@
+# Gameplane modules
+
+OCI game templates for Gameplane. Each `<name>/` folder holds `module.yaml`,
+`template.yaml`, `README.md` and optional `icon.png`, `specs.md`, `samples/`.
+`build.sh push` publishes them; `validate.py` preflight-checks them in CI.
+
+## Translations
+
+A module can ship translations in `<name>/locales/<tag>.json` (flat JSON,
+message id to ICU message).
+
+- `locales/en.json` is the English reference. It is generated, never
+  hand-written: `gp-module i18n extract <name>`. It is not pushed to the registry.
+- To add a language, copy `en.json` to `locales/<tag>.json` (a valid language
+  tag such as `de` or `pt-BR`), translate the values, keep the placeholders,
+  then run `gp-module i18n stamp <name>` to record the source hashes.
+- `build.sh push` adds one layer per `locales/<tag>.json` (except `en.json`).
+- CI runs `i18n-check --module` on every module with a `locales/` folder: ids
+  must match the template, placeholders must match English, and `en.json`
+  must not drift from the template.
diff --git a/build.sh b/build.sh
index d57ede2..a9c251d 100755
--- a/build.sh
+++ b/build.sh
@@ -11,6 +11,11 @@
 #   modules/build.sh push --registry localhost:5001 --name minecraft-java --insecure
 #   modules/build.sh push --registry $REG --plain-http   # all modules, plain-http
 #
+# Translations: every <name>/locales/<tag>.json except en.json is pushed as an
+# extra layer (media type application/vnd.gameplane.module.locale.v1+json,
+# file name annotation locales/<tag>.json). en.json is the generated English
+# reference and is never shipped. Bundles without locales are unchanged.
+#
 # Required: oras >= 1.2.0  (https://oras.land/docs/installation)
 # For --sign: cosign >= 2.0  (https://docs.sigstore.dev/cosign/installation)
 #   Signing stays on cosign's classic signature format
@@ -25,6 +30,7 @@ MEDIA_METADATA="application/vnd.gameplane.module.metadata.v1+yaml"
 MEDIA_TEMPLATE="application/vnd.gameplane.module.template.v1+yaml"
 MEDIA_README="application/vnd.gameplane.module.readme.v1+md"
 MEDIA_ICON="image/png"
+MEDIA_LOCALE="application/vnd.gameplane.module.locale.v1+json"
 
 usage() {
   cat <<USAGE
@@ -149,6 +155,15 @@ push_one() {
   [[ -f "$dir/README.md" ]] && layer_args+=( "README.md:$MEDIA_README" )
   [[ -f "$dir/icon.png"  ]] && layer_args+=( "icon.png:$MEDIA_ICON"   )
 
+  # One layer per translation file; the relative path keeps the
+  # "locales/<tag>.json" title annotation. en.json is never shipped.
+  local loc
+  for loc in "$dir"/locales/*.json; do
+    [[ -f "$loc" ]] || continue
+    [[ "$(basename "$loc")" == "en.json" ]] && continue
+    layer_args+=( "locales/$(basename "$loc"):$MEDIA_LOCALE" )
+  done
+
   # Capture combined output so we can recover the pushed manifest digest
   # for signing; still echo it so the push stays visible in CI logs.
   local out
diff --git a/minecraft-java/locales/en.json b/minecraft-java/locales/en.json
new file mode 100644
index 0000000..a7a79f8
--- /dev/null
+++ b/minecraft-java/locales/en.json
@@ -0,0 +1,494 @@
+{
+  "actions.announce-restart.description": {
+    "defaultMessage": "Warn players, save the world, then stop the server.",
+    "description": "Help text of server action announce-restart (template.yaml spec.capabilities.actions)"
+  },
+  "actions.announce-restart.displayName": {
+    "defaultMessage": "Announce restart",
+    "description": "Label of server action announce-restart (template.yaml spec.capabilities.actions)"
+  },
+  "actions.announce-restart.group": {
+    "defaultMessage": "Server",
+    "description": "Group heading of server action announce-restart (template.yaml spec.capabilities.actions)"
+  },
+  "actions.announce-restart.params.message.displayName": {
+    "defaultMessage": "Message",
+    "description": "Label of parameter message of server action announce-restart (template.yaml spec.capabilities.actions)"
+  },
+  "actions.broadcast.description": {
+    "defaultMessage": "Send a chat message to everyone on the server.",
+    "description": "Help text of server action broadcast (template.yaml spec.capabilities.actions)"
+  },
+  "actions.broadcast.displayName": {
+    "defaultMessage": "Broadcast message",
+    "description": "Label of server action broadcast (template.yaml spec.capabilities.actions)"
+  },
+  "actions.broadcast.group": {
+    "defaultMessage": "Server",
+    "description": "Group heading of server action broadcast (template.yaml spec.capabilities.actions)"
+  },
+  "actions.broadcast.params.message.displayName": {
+    "defaultMessage": "Message",
+    "description": "Label of parameter message of server action broadcast (template.yaml spec.capabilities.actions)"
+  },
+  "actions.give-item.description": {
+    "defaultMessage": "Grant an item to a player.",
+    "description": "Help text of server action give-item (template.yaml spec.capabilities.actions)"
+  },
+  "actions.give-item.displayName": {
+    "defaultMessage": "Give item",
+    "description": "Label of server action give-item (template.yaml spec.capabilities.actions)"
+  },
+  "actions.give-item.group": {
+    "defaultMessage": "Players",
+    "description": "Group heading of server action give-item (template.yaml spec.capabilities.actions)"
+  },
+  "actions.give-item.params.count.displayName": {
+    "defaultMessage": "Quantity",
+    "description": "Label of parameter count of server action give-item (template.yaml spec.capabilities.actions)"
+  },
+  "actions.give-item.params.item.displayName": {
+    "defaultMessage": "Item ID (e.g. diamond, golden_apple)",
+    "description": "Label of parameter item of server action give-item (template.yaml spec.capabilities.actions)"
+  },
+  "actions.give-item.params.player.displayName": {
+    "defaultMessage": "Player name",
+    "description": "Label of parameter player of server action give-item (template.yaml spec.capabilities.actions)"
+  },
+  "actions.save-world.description": {
+    "defaultMessage": "Flush the world to disk now.",
+    "description": "Help text of server action save-world (template.yaml spec.capabilities.actions)"
+  },
+  "actions.save-world.displayName": {
+    "defaultMessage": "Save world",
+    "description": "Label of server action save-world (template.yaml spec.capabilities.actions)"
+  },
+  "actions.save-world.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action save-world (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-difficulty.displayName": {
+    "defaultMessage": "Set difficulty",
+    "description": "Label of server action set-difficulty (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-difficulty.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action set-difficulty (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-difficulty.params.level.displayName": {
+    "defaultMessage": "Difficulty",
+    "description": "Label of parameter level of server action set-difficulty (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-difficulty.params.level.options.easy": {
+    "defaultMessage": "easy",
+    "description": "Choice \"easy\" of parameter level of server action set-difficulty (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-difficulty.params.level.options.hard": {
+    "defaultMessage": "hard",
+    "description": "Choice \"hard\" of parameter level of server action set-difficulty (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-difficulty.params.level.options.normal": {
+    "defaultMessage": "normal",
+    "description": "Choice \"normal\" of parameter level of server action set-difficulty (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-difficulty.params.level.options.peaceful": {
+    "defaultMessage": "peaceful",
+    "description": "Choice \"peaceful\" of parameter level of server action set-difficulty (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.description": {
+    "defaultMessage": "Change one player''s game mode.",
+    "description": "Help text of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.displayName": {
+    "defaultMessage": "Set player game mode",
+    "description": "Label of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.group": {
+    "defaultMessage": "Players",
+    "description": "Group heading of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.params.mode.displayName": {
+    "defaultMessage": "Game mode",
+    "description": "Label of parameter mode of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.params.mode.options.adventure": {
+    "defaultMessage": "adventure",
+    "description": "Choice \"adventure\" of parameter mode of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.params.mode.options.creative": {
+    "defaultMessage": "creative",
+    "description": "Choice \"creative\" of parameter mode of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.params.mode.options.spectator": {
+    "defaultMessage": "spectator",
+    "description": "Choice \"spectator\" of parameter mode of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.params.mode.options.survival": {
+    "defaultMessage": "survival",
+    "description": "Choice \"survival\" of parameter mode of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-gamemode.params.player.displayName": {
+    "defaultMessage": "Player name",
+    "description": "Label of parameter player of server action set-gamemode (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.displayName": {
+    "defaultMessage": "Set time",
+    "description": "Label of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.displayName": {
+    "defaultMessage": "Time of day",
+    "description": "Label of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.day": {
+    "defaultMessage": "day",
+    "description": "Choice \"day\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.midnight": {
+    "defaultMessage": "midnight",
+    "description": "Choice \"midnight\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.night": {
+    "defaultMessage": "night",
+    "description": "Choice \"night\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.noon": {
+    "defaultMessage": "noon",
+    "description": "Choice \"noon\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-weather.displayName": {
+    "defaultMessage": "Set weather",
+    "description": "Label of server action set-weather (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-weather.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action set-weather (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-weather.params.weather.displayName": {
+    "defaultMessage": "Weather",
+    "description": "Label of parameter weather of server action set-weather (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-weather.params.weather.options.clear": {
+    "defaultMessage": "clear",
+    "description": "Choice \"clear\" of parameter weather of server action set-weather (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-weather.params.weather.options.rain": {
+    "defaultMessage": "rain",
+    "description": "Choice \"rain\" of parameter weather of server action set-weather (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-weather.params.weather.options.thunder": {
+    "defaultMessage": "thunder",
+    "description": "Choice \"thunder\" of parameter weather of server action set-weather (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-daylight-cycle.description": {
+    "defaultMessage": "Freeze or resume the day/night cycle.",
+    "description": "Help text of server action toggle-daylight-cycle (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-daylight-cycle.displayName": {
+    "defaultMessage": "Toggle daylight cycle",
+    "description": "Label of server action toggle-daylight-cycle (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-daylight-cycle.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action toggle-daylight-cycle (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-daylight-cycle.params.value.displayName": {
+    "defaultMessage": "Daylight cycle",
+    "description": "Label of parameter value of server action toggle-daylight-cycle (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-daylight-cycle.params.value.options.false": {
+    "defaultMessage": "false",
+    "description": "Choice \"false\" of parameter value of server action toggle-daylight-cycle (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-daylight-cycle.params.value.options.true": {
+    "defaultMessage": "true",
+    "description": "Choice \"true\" of parameter value of server action toggle-daylight-cycle (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-keep-inventory.description": {
+    "defaultMessage": "Whether players keep their items on death.",
+    "description": "Help text of server action toggle-keep-inventory (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-keep-inventory.displayName": {
+    "defaultMessage": "Toggle keep inventory",
+    "description": "Label of server action toggle-keep-inventory (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-keep-inventory.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action toggle-keep-inventory (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-keep-inventory.params.value.displayName": {
+    "defaultMessage": "Keep inventory",
+    "description": "Label of parameter value of server action toggle-keep-inventory (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-keep-inventory.params.value.options.false": {
+    "defaultMessage": "false",
+    "description": "Choice \"false\" of parameter value of server action toggle-keep-inventory (template.yaml spec.capabilities.actions)"
+  },
+  "actions.toggle-keep-inventory.params.value.options.true": {
+    "defaultMessage": "true",
+    "description": "Choice \"true\" of parameter value of server action toggle-keep-inventory (template.yaml spec.capabilities.actions)"
+  },
+  "config.DIFFICULTY.displayName": {
+    "defaultMessage": "Difficulty",
+    "description": "Label of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.easy": {
+    "defaultMessage": "easy",
+    "description": "Choice \"easy\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.hard": {
+    "defaultMessage": "hard",
+    "description": "Choice \"hard\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.normal": {
+    "defaultMessage": "normal",
+    "description": "Choice \"normal\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.peaceful": {
+    "defaultMessage": "peaceful",
+    "description": "Choice \"peaceful\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.HARDCORE.displayName": {
+    "defaultMessage": "Hardcore mode",
+    "description": "Label of configuration field HARDCORE (template.yaml spec.configSchema)"
+  },
+  "config.INIT_MEMORY.description": {
+    "defaultMessage": "Starting heap size (-Xms), at most JVM max heap. Leave empty to match the automatic max heap (a fixed heap avoids GC resizes).",
+    "description": "Help text of configuration field INIT_MEMORY (template.yaml spec.configSchema)"
+  },
+  "config.INIT_MEMORY.displayName": {
+    "defaultMessage": "JVM initial heap",
+    "description": "Label of configuration field INIT_MEMORY (template.yaml spec.configSchema)"
+  },
+  "config.LEVEL_SEED.description": {
+    "defaultMessage": "Leave blank for a random seed.",
+    "description": "Help text of configuration field LEVEL_SEED (template.yaml spec.configSchema)"
+  },
+  "config.LEVEL_SEED.displayName": {
+    "defaultMessage": "World seed",
+    "description": "Label of configuration field LEVEL_SEED (template.yaml spec.configSchema)"
+  },
+  "config.MAX_MEMORY.description": {
+    "defaultMessage": "Java heap ceiling (-Xmx, e.g. 2G, 3072M). Leave empty to size it automatically to 75% of the container memory limit — it then tracks the limit whenever you resize the server. If you set it yourself, keep roughly 25% below the limit: the JVM needs headroom for non-heap memory, and exceeding the limit gets the server OOM-killed.",
+    "description": "Help text of configuration field MAX_MEMORY (template.yaml spec.configSchema)"
+  },
+  "config.MAX_MEMORY.displayName": {
+    "defaultMessage": "JVM max heap",
+    "description": "Label of configuration field MAX_MEMORY (template.yaml spec.configSchema)"
+  },
+  "config.MAX_PLAYERS.displayName": {
+    "defaultMessage": "Max players",
+    "description": "Label of configuration field MAX_PLAYERS (template.yaml spec.configSchema)"
+  },
+  "config.MODE.displayName": {
+    "defaultMessage": "Game mode",
+    "description": "Label of configuration field MODE (template.yaml spec.configSchema)"
+  },
+  "config.MODE.options.adventure": {
+    "defaultMessage": "adventure",
+    "description": "Choice \"adventure\" of configuration field MODE (template.yaml spec.configSchema)"
+  },
+  "config.MODE.options.creative": {
+    "defaultMessage": "creative",
+    "description": "Choice \"creative\" of configuration field MODE (template.yaml spec.configSchema)"
+  },
+  "config.MODE.options.spectator": {
+    "defaultMessage": "spectator",
+    "description": "Choice \"spectator\" of configuration field MODE (template.yaml spec.configSchema)"
+  },
+  "config.MODE.options.survival": {
+    "defaultMessage": "survival",
+    "description": "Choice \"survival\" of configuration field MODE (template.yaml spec.configSchema)"
+  },
+  "config.MOTD.description": {
+    "defaultMessage": "Server description shown in the multiplayer list.",
+    "description": "Help text of configuration field MOTD (template.yaml spec.configSchema)"
+  },
+  "config.MOTD.displayName": {
+    "defaultMessage": "MOTD",
+    "description": "Label of configuration field MOTD (template.yaml spec.configSchema)"
+  },
+  "config.ONLINE_MODE.description": {
+    "defaultMessage": "Verify players with Mojang. Disable only for offline/LAN setups.",
+    "description": "Help text of configuration field ONLINE_MODE (template.yaml spec.configSchema)"
+  },
+  "config.ONLINE_MODE.displayName": {
+    "defaultMessage": "Online mode",
+    "description": "Label of configuration field ONLINE_MODE (template.yaml spec.configSchema)"
+  },
+  "config.PVP.displayName": {
+    "defaultMessage": "PvP enabled",
+    "description": "Label of configuration field PVP (template.yaml spec.configSchema)"
+  },
+  "config.VIEW_DISTANCE.displayName": {
+    "defaultMessage": "View distance (chunks)",
+    "description": "Label of configuration field VIEW_DISTANCE (template.yaml spec.configSchema)"
+  },
+  "config.WHITELIST_ENABLED.displayName": {
+    "defaultMessage": "Enforce whitelist",
+    "description": "Label of configuration field WHITELIST_ENABLED (template.yaml spec.configSchema)"
+  },
+  "metrics.difficulty.displayName": {
+    "defaultMessage": "Difficulty",
+    "description": "Label of status metric difficulty (template.yaml spec.capabilities.status.metrics)"
+  },
+  "metrics.seed.displayName": {
+    "defaultMessage": "World seed",
+    "description": "Label of status metric seed (template.yaml spec.capabilities.status.metrics)"
+  },
+  "mods.bukkit.displayName": {
+    "defaultMessage": "Plugins (Bukkit)",
+    "description": "Label of the mod volume bukkit in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "mods.fabric.displayName": {
+    "defaultMessage": "Mods (Fabric)",
+    "description": "Label of the mod volume fabric in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "mods.forge.displayName": {
+    "defaultMessage": "Mods (Forge)",
+    "description": "Label of the mod volume forge in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "mods.neoforge.displayName": {
+    "defaultMessage": "Mods (NeoForge)",
+    "description": "Label of the mod volume neoforge in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "mods.paper.displayName": {
+    "defaultMessage": "Plugins (Paper)",
+    "description": "Label of the mod volume paper in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "mods.purpur.displayName": {
+    "defaultMessage": "Plugins (Purpur)",
+    "description": "Label of the mod volume purpur in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "mods.quilt.displayName": {
+    "defaultMessage": "Mods (Quilt)",
+    "description": "Label of the mod volume quilt in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "mods.spigot.displayName": {
+    "defaultMessage": "Plugins (Spigot)",
+    "description": "Label of the mod volume spigot in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "module.displayName": {
+    "defaultMessage": "Minecraft (Java Edition)",
+    "description": "Display name of the module (module.yaml displayName)"
+  },
+  "module.summary": {
+    "defaultMessage": "Vanilla / Paper / Spigot / Bukkit / Purpur / Forge / NeoForge / Fabric / Quilt servers (itzg/minecraft-server) with a version+loader picker spanning 1.16.5–latest, per-loader mod volumes, and in-app Modrinth browse.",
+    "description": "One-line summary of the module (module.yaml summary)"
+  },
+  "template.description": {
+    "defaultMessage": "Vanilla, Paper, Spigot, Bukkit, Purpur, Forge, NeoForge, Fabric, or Quilt\nMinecraft: Java Edition servers using the community\n[itzg/minecraft-server](https://github.com/itzg/docker-minecraft-server)\nimage. Pick a version+loader in the New Server wizard; each loader''s\nmods/plugins live on their own volume so switching never clobbers another.\n",
+    "description": "Description of the game template (template.yaml spec.description)"
+  },
+  "template.displayName": {
+    "defaultMessage": "Minecraft (Java Edition)",
+    "description": "Display name of the game template (template.yaml spec.displayName)"
+  },
+  "versions.1~116~15-forge.displayName": {
+    "defaultMessage": "1.16.5 · Forge",
+    "description": "Label of game version 1.16.5-forge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~116~15-paper.displayName": {
+    "defaultMessage": "1.16.5 · Paper",
+    "description": "Label of game version 1.16.5-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~118~12-forge.displayName": {
+    "defaultMessage": "1.18.2 · Forge",
+    "description": "Label of game version 1.18.2-forge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~118~12-paper.displayName": {
+    "defaultMessage": "1.18.2 · Paper",
+    "description": "Label of game version 1.18.2-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~119~14-forge.displayName": {
+    "defaultMessage": "1.19.4 · Forge",
+    "description": "Label of game version 1.19.4-forge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~119~14-paper.displayName": {
+    "defaultMessage": "1.19.4 · Paper",
+    "description": "Label of game version 1.19.4-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~120~11-fabric.displayName": {
+    "defaultMessage": "1.20.1 · Fabric",
+    "description": "Label of game version 1.20.1-fabric in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~120~11-forge.displayName": {
+    "defaultMessage": "1.20.1 · Forge",
+    "description": "Label of game version 1.20.1-forge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~120~11-paper.displayName": {
+    "defaultMessage": "1.20.1 · Paper",
+    "description": "Label of game version 1.20.1-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~120~14-fabric.displayName": {
+    "defaultMessage": "1.20.4 · Fabric",
+    "description": "Label of game version 1.20.4-fabric in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~120~14-forge.displayName": {
+    "defaultMessage": "1.20.4 · Forge",
+    "description": "Label of game version 1.20.4-forge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~120~14-paper.displayName": {
+    "defaultMessage": "1.20.4 · Paper",
+    "description": "Label of game version 1.20.4-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~11-fabric.displayName": {
+    "defaultMessage": "1.21.1 · Fabric",
+    "description": "Label of game version 1.21.1-fabric in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~11-neoforge.displayName": {
+    "defaultMessage": "1.21.1 · NeoForge",
+    "description": "Label of game version 1.21.1-neoforge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~11-paper.displayName": {
+    "defaultMessage": "1.21.1 · Paper",
+    "description": "Label of game version 1.21.1-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~11-vanilla.displayName": {
+    "defaultMessage": "1.21.1 · Vanilla",
+    "description": "Label of game version 1.21.1-vanilla in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~14-fabric.displayName": {
+    "defaultMessage": "1.21.4 · Fabric",
+    "description": "Label of game version 1.21.4-fabric in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~14-forge.displayName": {
+    "defaultMessage": "1.21.4 · Forge",
+    "description": "Label of game version 1.21.4-forge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~14-neoforge.displayName": {
+    "defaultMessage": "1.21.4 · NeoForge",
+    "description": "Label of game version 1.21.4-neoforge in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~14-paper.displayName": {
+    "defaultMessage": "1.21.4 · Paper",
+    "description": "Label of game version 1.21.4-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~14-purpur.displayName": {
+    "defaultMessage": "1.21.4 · Purpur",
+    "description": "Label of game version 1.21.4-purpur in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~14-quilt.displayName": {
+    "defaultMessage": "1.21.4 · Quilt",
+    "description": "Label of game version 1.21.4-quilt in the version picker (template.yaml spec.versions)"
+  },
+  "versions.1~121~14-vanilla.displayName": {
+    "defaultMessage": "1.21.4 · Vanilla",
+    "description": "Label of game version 1.21.4-vanilla in the version picker (template.yaml spec.versions)"
+  },
+  "versions.latest-fabric.displayName": {
+    "defaultMessage": "Latest · Fabric",
+    "description": "Label of game version latest-fabric in the version picker (template.yaml spec.versions)"
+  },
+  "versions.latest-paper.displayName": {
+    "defaultMessage": "Latest · Paper",
+    "description": "Label of game version latest-paper in the version picker (template.yaml spec.versions)"
+  },
+  "versions.latest-vanilla.displayName": {
+    "defaultMessage": "Latest · Vanilla",
+    "description": "Label of game version latest-vanilla in the version picker (template.yaml spec.versions)"
+  }
+}
diff --git a/terraria/locales/en.json b/terraria/locales/en.json
new file mode 100644
index 0000000..bd786f7
--- /dev/null
+++ b/terraria/locales/en.json
@@ -0,0 +1,278 @@
+{
+  "actions.ban-player.description": {
+    "defaultMessage": "Disconnect and ban a player.",
+    "description": "Help text of server action ban-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.ban-player.displayName": {
+    "defaultMessage": "Ban player",
+    "description": "Label of server action ban-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.ban-player.group": {
+    "defaultMessage": "Players",
+    "description": "Group heading of server action ban-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.ban-player.params.player.displayName": {
+    "defaultMessage": "Player name",
+    "description": "Label of parameter player of server action ban-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.broadcast.displayName": {
+    "defaultMessage": "Broadcast message",
+    "description": "Label of server action broadcast (template.yaml spec.capabilities.actions)"
+  },
+  "actions.broadcast.group": {
+    "defaultMessage": "Server",
+    "description": "Group heading of server action broadcast (template.yaml spec.capabilities.actions)"
+  },
+  "actions.broadcast.params.message.displayName": {
+    "defaultMessage": "Message",
+    "description": "Label of parameter message of server action broadcast (template.yaml spec.capabilities.actions)"
+  },
+  "actions.kick-player.description": {
+    "defaultMessage": "Disconnect a player from the server.",
+    "description": "Help text of server action kick-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.kick-player.displayName": {
+    "defaultMessage": "Kick player",
+    "description": "Label of server action kick-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.kick-player.group": {
+    "defaultMessage": "Players",
+    "description": "Group heading of server action kick-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.kick-player.params.player.displayName": {
+    "defaultMessage": "Player name",
+    "description": "Label of parameter player of server action kick-player (template.yaml spec.capabilities.actions)"
+  },
+  "actions.save-world.displayName": {
+    "defaultMessage": "Save world",
+    "description": "Label of server action save-world (template.yaml spec.capabilities.actions)"
+  },
+  "actions.save-world.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action save-world (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-motd.displayName": {
+    "defaultMessage": "Set MOTD",
+    "description": "Label of server action set-motd (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-motd.group": {
+    "defaultMessage": "Server",
+    "description": "Group heading of server action set-motd (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-motd.params.message.displayName": {
+    "defaultMessage": "Message",
+    "description": "Label of parameter message of server action set-motd (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.displayName": {
+    "defaultMessage": "Set time",
+    "description": "Label of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.displayName": {
+    "defaultMessage": "Time of day",
+    "description": "Label of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.dawn": {
+    "defaultMessage": "dawn",
+    "description": "Choice \"dawn\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.dusk": {
+    "defaultMessage": "dusk",
+    "description": "Choice \"dusk\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.midnight": {
+    "defaultMessage": "midnight",
+    "description": "Choice \"midnight\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.set-time.params.time.options.noon": {
+    "defaultMessage": "noon",
+    "description": "Choice \"noon\" of parameter time of server action set-time (template.yaml spec.capabilities.actions)"
+  },
+  "actions.settle-water.description": {
+    "defaultMessage": "Settle all flowing liquids.",
+    "description": "Help text of server action settle-water (template.yaml spec.capabilities.actions)"
+  },
+  "actions.settle-water.displayName": {
+    "defaultMessage": "Settle water",
+    "description": "Label of server action settle-water (template.yaml spec.capabilities.actions)"
+  },
+  "actions.settle-water.group": {
+    "defaultMessage": "World",
+    "description": "Group heading of server action settle-water (template.yaml spec.capabilities.actions)"
+  },
+  "config.AUTOCREATE.description": {
+    "defaultMessage": "World size to generate if the world doesn''t exist. 1 small, 2 medium, 3 large.",
+    "description": "Help text of configuration field AUTOCREATE (template.yaml spec.configSchema)"
+  },
+  "config.AUTOCREATE.displayName": {
+    "defaultMessage": "World size",
+    "description": "Label of configuration field AUTOCREATE (template.yaml spec.configSchema)"
+  },
+  "config.AUTOCREATE.options.1": {
+    "defaultMessage": "1",
+    "description": "Choice \"1\" of configuration field AUTOCREATE (template.yaml spec.configSchema)"
+  },
+  "config.AUTOCREATE.options.2": {
+    "defaultMessage": "2",
+    "description": "Choice \"2\" of configuration field AUTOCREATE (template.yaml spec.configSchema)"
+  },
+  "config.AUTOCREATE.options.3": {
+    "defaultMessage": "3",
+    "description": "Choice \"3\" of configuration field AUTOCREATE (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.description": {
+    "defaultMessage": "0 classic, 1 expert, 2 master, 3 journey.",
+    "description": "Help text of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.displayName": {
+    "defaultMessage": "Difficulty",
+    "description": "Label of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.0": {
+    "defaultMessage": "0",
+    "description": "Choice \"0\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.1": {
+    "defaultMessage": "1",
+    "description": "Choice \"1\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.2": {
+    "defaultMessage": "2",
+    "description": "Choice \"2\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.DIFFICULTY.options.3": {
+    "defaultMessage": "3",
+    "description": "Choice \"3\" of configuration field DIFFICULTY (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.displayName": {
+    "defaultMessage": "Language",
+    "description": "Label of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.de-DE": {
+    "defaultMessage": "de-DE",
+    "description": "Choice \"de-DE\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.en-US": {
+    "defaultMessage": "en-US",
+    "description": "Choice \"en-US\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.es-ES": {
+    "defaultMessage": "es-ES",
+    "description": "Choice \"es-ES\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.fr-FR": {
+    "defaultMessage": "fr-FR",
+    "description": "Choice \"fr-FR\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.it-IT": {
+    "defaultMessage": "it-IT",
+    "description": "Choice \"it-IT\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.ja-JP": {
+    "defaultMessage": "ja-JP",
+    "description": "Choice \"ja-JP\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.pl-PL": {
+    "defaultMessage": "pl-PL",
+    "description": "Choice \"pl-PL\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.pt-BR": {
+    "defaultMessage": "pt-BR",
+    "description": "Choice \"pt-BR\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.ru-RU": {
+    "defaultMessage": "ru-RU",
+    "description": "Choice \"ru-RU\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.LANGUAGE.options.zh-Hans": {
+    "defaultMessage": "zh-Hans",
+    "description": "Choice \"zh-Hans\" of configuration field LANGUAGE (template.yaml spec.configSchema)"
+  },
+  "config.MAXPLAYERS.displayName": {
+    "defaultMessage": "Max players",
+    "description": "Label of configuration field MAXPLAYERS (template.yaml spec.configSchema)"
+  },
+  "config.MODPACK.description": {
+    "defaultMessage": "tModLoader only — a modpack folder name under ModPacks. Leave blank for the built-in empty \"vanilla\" pack.",
+    "description": "Help text of configuration field MODPACK (template.yaml spec.configSchema)"
+  },
+  "config.MODPACK.displayName": {
+    "defaultMessage": "Active modpack",
+    "description": "Label of configuration field MODPACK (template.yaml spec.configSchema)"
+  },
+  "config.MOTD.displayName": {
+    "defaultMessage": "MOTD",
+    "description": "Label of configuration field MOTD (template.yaml spec.configSchema)"
+  },
+  "config.PASSWORD.description": {
+    "defaultMessage": "Leave blank for an open server.",
+    "description": "Help text of configuration field PASSWORD (template.yaml spec.configSchema)"
+  },
+  "config.PASSWORD.displayName": {
+    "defaultMessage": "Server password",
+    "description": "Label of configuration field PASSWORD (template.yaml spec.configSchema)"
+  },
+  "config.SECURE.displayName": {
+    "defaultMessage": "Cheat protection",
+    "description": "Label of configuration field SECURE (template.yaml spec.configSchema)"
+  },
+  "config.SECURE.options.0": {
+    "defaultMessage": "0",
+    "description": "Choice \"0\" of configuration field SECURE (template.yaml spec.configSchema)"
+  },
+  "config.SECURE.options.1": {
+    "defaultMessage": "1",
+    "description": "Choice \"1\" of configuration field SECURE (template.yaml spec.configSchema)"
+  },
+  "config.SEED.description": {
+    "defaultMessage": "Used when a new world is generated. Leave blank for random.",
+    "description": "Help text of configuration field SEED (template.yaml spec.configSchema)"
+  },
+  "config.SEED.displayName": {
+    "defaultMessage": "World seed",
+    "description": "Label of configuration field SEED (template.yaml spec.configSchema)"
+  },
+  "config.WORLDNAME.displayName": {
+    "defaultMessage": "World name",
+    "description": "Label of configuration field WORLDNAME (template.yaml spec.configSchema)"
+  },
+  "mods.tmodloader.displayName": {
+    "defaultMessage": "tModLoader ModPacks",
+    "description": "Label of the mod volume tmodloader in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "module.displayName": {
+    "defaultMessage": "Terraria",
+    "description": "Display name of the module (module.yaml displayName)"
+  },
+  "module.summary": {
+    "defaultMessage": "Terraria + tModLoader dedicated server (passivelemon/terraria-docker) with a vanilla/tModLoader version picker and a tModLoader ModPacks volume. Console via container stdin.",
+    "description": "One-line summary of the module (module.yaml summary)"
+  },
+  "template.description": {
+    "defaultMessage": "Terraria + tModLoader dedicated server using\n[passivelemon/terraria-docker](https://github.com/PassiveLemon/terraria-docker).\nChoose vanilla or tModLoader (and the build) in the wizard — the choice\nmaps to an image tag. tModLoader modpacks are managed from the Mods tab.\nConsole attaches to container stdin (pty); no RCON.\n",
+    "description": "Description of the game template (template.yaml spec.description)"
+  },
+  "template.displayName": {
+    "defaultMessage": "Terraria",
+    "description": "Display name of the game template (template.yaml spec.displayName)"
+  },
+  "versions.tmodloader-2026.displayName": {
+    "defaultMessage": "tModLoader · 2026 stable",
+    "description": "Label of game version tmodloader-2026 in the version picker (template.yaml spec.versions)"
+  },
+  "versions.tmodloader-latest.displayName": {
+    "defaultMessage": "tModLoader · latest",
+    "description": "Label of game version tmodloader-latest in the version picker (template.yaml spec.versions)"
+  },
+  "versions.tmodloader-preview.displayName": {
+    "defaultMessage": "tModLoader · latest preview",
+    "description": "Label of game version tmodloader-preview in the version picker (template.yaml spec.versions)"
+  },
+  "versions.vanilla-latest.displayName": {
+    "defaultMessage": "Vanilla · latest",
+    "description": "Label of game version vanilla-latest in the version picker (template.yaml spec.versions)"
+  }
+}
diff --git a/terraria/specs.md b/terraria/specs.md
index 56b9f79..3889d65 100644
--- a/terraria/specs.md
+++ b/terraria/specs.md
@@ -84,3 +84,5 @@ Declared ports under `spec.ports`:
 - Official Game Documentation: https://terraria.org/
 - Upstream Container Repository: https://github.com/PassiveLemon/terraria-docker
 - Steam Dedicated Server AppID: `105600`
+
+This module ships `locales/en.json`, generated by `gp-module i18n extract` (never hand-edited).
diff --git a/valheim/locales/en.json b/valheim/locales/en.json
new file mode 100644
index 0000000..f1ba00f
--- /dev/null
+++ b/valheim/locales/en.json
@@ -0,0 +1,74 @@
+{
+  "config.BACKUPS.description": {
+    "defaultMessage": "lloesche image also rolls backups. The Gameplane Backup CRD is the preferred path; leave off.",
+    "description": "Help text of configuration field BACKUPS (template.yaml spec.configSchema)"
+  },
+  "config.BACKUPS.displayName": {
+    "defaultMessage": "In-container backups",
+    "description": "Label of configuration field BACKUPS (template.yaml spec.configSchema)"
+  },
+  "config.BEPINEX.description": {
+    "defaultMessage": "Turn on the BepInEx mod loader. Required to use the Mods tab.",
+    "description": "Help text of configuration field BEPINEX (template.yaml spec.configSchema)"
+  },
+  "config.BEPINEX.displayName": {
+    "defaultMessage": "Enable BepInEx mods",
+    "description": "Label of configuration field BEPINEX (template.yaml spec.configSchema)"
+  },
+  "config.SERVER_NAME.displayName": {
+    "defaultMessage": "Server name",
+    "description": "Label of configuration field SERVER_NAME (template.yaml spec.configSchema)"
+  },
+  "config.SERVER_PASS.description": {
+    "defaultMessage": "5+ characters. Required by Valheim.",
+    "description": "Help text of configuration field SERVER_PASS (template.yaml spec.configSchema)"
+  },
+  "config.SERVER_PASS.displayName": {
+    "defaultMessage": "Password",
+    "description": "Label of configuration field SERVER_PASS (template.yaml spec.configSchema)"
+  },
+  "config.SERVER_PUBLIC.displayName": {
+    "defaultMessage": "List publicly",
+    "description": "Label of configuration field SERVER_PUBLIC (template.yaml spec.configSchema)"
+  },
+  "config.UPDATE_CRON.description": {
+    "defaultMessage": "When to check Steam for a game update. Blank disables.",
+    "description": "Help text of configuration field UPDATE_CRON (template.yaml spec.configSchema)"
+  },
+  "config.UPDATE_CRON.displayName": {
+    "defaultMessage": "Auto-update cron",
+    "description": "Label of configuration field UPDATE_CRON (template.yaml spec.configSchema)"
+  },
+  "config.WORLD_NAME.displayName": {
+    "defaultMessage": "World",
+    "description": "Label of configuration field WORLD_NAME (template.yaml spec.configSchema)"
+  },
+  "mods.bepinex.displayName": {
+    "defaultMessage": "BepInEx plugins",
+    "description": "Label of the mod volume bepinex in the Mods tab (template.yaml spec.capabilities.mods.loaders)"
+  },
+  "module.displayName": {
+    "defaultMessage": "Valheim (Dedicated)",
+    "description": "Display name of the module (module.yaml displayName)"
+  },
+  "module.summary": {
+    "defaultMessage": "Valheim dedicated server (lloesche/valheim-server) with a stable/public-test channel picker, a BepInEx mod volume, and in-app Thunderstore browse. Crossplay-friendly.",
+    "description": "One-line summary of the module (module.yaml summary)"
+  },
+  "template.description": {
+    "defaultMessage": "Valheim dedicated server using\n[lloesche/valheim-server](https://github.com/lloesche/valheim-server-docker).\nWorld persistence, password, crossplay, and BepInEx mods. Choose the\nstable or public-test channel in the New Server wizard.\n",
+    "description": "Description of the game template (template.yaml spec.description)"
+  },
+  "template.displayName": {
+    "defaultMessage": "Valheim (Dedicated)",
+    "description": "Display name of the game template (template.yaml spec.displayName)"
+  },
+  "versions.public-test.displayName": {
+    "defaultMessage": "Public Test (beta)",
+    "description": "Label of game version public-test in the version picker (template.yaml spec.versions)"
+  },
+  "versions.stable.displayName": {
+    "defaultMessage": "Stable",
+    "description": "Label of game version stable in the version picker (template.yaml spec.versions)"
+  }
+}
diff --git a/valheim/specs.md b/valheim/specs.md
index b463155..7c00fde 100644
--- a/valheim/specs.md
+++ b/valheim/specs.md
@@ -85,3 +85,5 @@ Declared ports under `spec.ports`:
 - Valheim Dedicated Server Guide: https://valheim.fandom.com/wiki/Dedicated_servers
 - Upstream Container Repository: https://github.com/lloesche/valheim-server-docker
 - Steam Dedicated Server AppID: 896660
+
+This module ships `locales/en.json`, generated by `gp-module i18n extract` (never hand-edited).