diff --git a/frontend/src/components/LeftoverMapPlot.tsx b/frontend/src/components/LeftoverMapPlot.tsx
index 2250feb1a..d6eaae482 100644
--- a/frontend/src/components/LeftoverMapPlot.tsx
+++ b/frontend/src/components/LeftoverMapPlot.tsx
@@ -1,7 +1,6 @@
 import type { LeftoverMapAxis, LeftoverMapCoverage, LeftoverPair } from "../api";
 import { t, tf } from "../i18n";
 import { formatLeftoverMapCoordinatePair } from "../leftoverMapCoordinates";
-import { LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK } from "../leftoverMapRank";
 import {
   leftoverMapCoverageCounts,
   leftoverMapIncompleteItemCount,
@@ -171,8 +170,8 @@ function leftoverMapPlotAxisText(
  * comparison graphic from already-named leftover expected
  * with distinct leftover map comparison graphic leftover expected
  * labels. ADR 0318 captions leftover-map rank on that comparison graphic
- * from already-named leftover-map rank with a distinct comparison graphic
- * accessible name.
+ * from already-named leftover-map rank while composing existing localized
+ * comparison-graphic and rank labels rather than adding SPA translation debt.
  * Never invent a leftover score.
  */
 export function LeftoverMapPlot({
@@ -469,12 +468,13 @@ export function LeftoverMapPlot({
                   x={segment.rankX}
                   y={segment.rankY}
                   textAnchor="middle"
-                  aria-label={tf(
+                  aria-label={
                     variant === "comparison"
-                      ? LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK
-                      : LEFTOVER_MAP_PLOT_SEGMENT_RANK,
-                    { label: segment.rankLabel },
-                  )}
+                      ? `${t(LEFTOVER_MAP_COMPARE_PLOT_LABEL)}: ${tf(LEFTOVER_MAP_PLOT_SEGMENT_RANK, {
+                          label: segment.rankLabel,
+                        })}`
+                      : tf(LEFTOVER_MAP_PLOT_SEGMENT_RANK, { label: segment.rankLabel })
+                  }
                 >
                   {segment.rankLabel}
                 </text>
diff --git a/frontend/src/leftoverMapRank.ts b/frontend/src/leftoverMapRank.ts
index 557b185f0..f294d1d0a 100644
--- a/frontend/src/leftoverMapRank.ts
+++ b/frontend/src/leftoverMapRank.ts
@@ -7,9 +7,6 @@ export const LEFTOVER_RANK_STRUCTURE_ACTION =
 
 export const LEFTOVER_MAP_COMPARE_RANK_LABEL = "Leftover map comparison rank";
 
-export const LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK =
-  "leftover map comparison graphic leftover-map rank {label}";
-
 /**
  * Format persisted rank evidence without coercion or inference.
  *
diff --git a/frontend/src/leftoverMapRankLocalization.test.ts b/frontend/src/leftoverMapRankLocalization.test.ts
new file mode 100644
index 000000000..731e2ef74
--- /dev/null
+++ b/frontend/src/leftoverMapRankLocalization.test.ts
@@ -0,0 +1,28 @@
+import { afterEach, describe, expect, it } from "vitest";
+import { setLocale, t, tf, type Locale } from "./i18n";
+import {
+  LEFTOVER_MAP_COMPARE_PLOT_LABEL,
+  LEFTOVER_MAP_PLOT_SEGMENT_RANK,
+} from "./leftoverMapPlotLayout";
+
+const EXPECTED = [
+  ["ko", "잔여 지도 비교 그림: 잔여 지도 순위 rank 1"],
+  ["zh", "残差地图比较图形: 残差图秩 rank 1"],
+  ["ja", "残差マップの比較図: 残差マップ階数 rank 1"],
+  ["vi", "Đồ họa so sánh bản đồ phần dư: hạng bản đồ phần dư rank 1"],
+] as const satisfies readonly (readonly [Exclude<Locale, "en">, string])[];
+
+function comparisonRankAccessibleName(label: string): string {
+  return `${t(LEFTOVER_MAP_COMPARE_PLOT_LABEL)}: ${tf(LEFTOVER_MAP_PLOT_SEGMENT_RANK, { label })}`;
+}
+
+afterEach(() => {
+  setLocale("en");
+});
+
+describe("grouping-comparison leftover-map rank localization", () => {
+  it.each(EXPECTED)("keeps the accessible rank caption localized in %s", (locale, expected) => {
+    setLocale(locale);
+    expect(comparisonRankAccessibleName("rank 1")).toBe(expected);
+  });
+});
diff --git a/tests/test_grouping_comparison_graphic_rank_contract.py b/tests/test_grouping_comparison_graphic_rank_contract.py
index 63c9cf452..b0b243402 100644
--- a/tests/test_grouping_comparison_graphic_rank_contract.py
+++ b/tests/test_grouping_comparison_graphic_rank_contract.py
@@ -10,23 +10,20 @@
 RANK_SOURCE = ROOT / "frontend" / "src" / "leftoverMapRank.ts"
 
 
-def test_comparison_graphic_names_the_persisted_rank_with_distinct_copy() -> None:
-    """Comparison SVG rank captions must not reuse report or strip accessible names."""
+def test_comparison_graphic_names_the_persisted_rank_with_distinct_localized_copy() -> None:
+    """Comparison rank names compose existing localized graphic and rank vocabulary."""
     plot_source = PLOT_SOURCE.read_text(encoding="utf-8")
     rank_source = RANK_SOURCE.read_text(encoding="utf-8")
 
+    assert "LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK" not in rank_source
+    assert "LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK" not in plot_source
+    assert 'variant === "comparison"' in plot_source
     assert (
-        'export const LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK =\n'
-        '  "leftover map comparison graphic leftover-map rank {label}";'
-        in rank_source
-    )
-    assert "LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK" in plot_source
-    assert re.search(
-        r'variant\s*===\s*"comparison"\s*\?\s*LEFTOVER_MAP_COMPARE_PLOT_SEGMENT_RANK\s*:\s*LEFTOVER_MAP_PLOT_SEGMENT_RANK',
-        plot_source,
-        re.DOTALL,
+        '`${t(LEFTOVER_MAP_COMPARE_PLOT_LABEL)}: ${tf(LEFTOVER_MAP_PLOT_SEGMENT_RANK, {'
+        in plot_source
     )
     assert "label: segment.rankLabel" in plot_source
+    assert ': tf(LEFTOVER_MAP_PLOT_SEGMENT_RANK, { label: segment.rankLabel })' in plot_source
 
 
 def test_rank_projection_consumes_only_persisted_fail_closed_evidence() -> None: