diff --git a/README.md b/README.md
index 5197d410..62956349 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ The general file structure for an extension is as follows:
     - `assets/descriptions/description-<locale>.md` contains a brief description of the extension in the language specified by `<locale>`
 - `contributions/` contains JSON files the platform uses to extend data structures for things like menus and settings. The JSON files are referenced from the manifest
 - `public/` contains other static files that are copied into the build folder
-- `test-data/` contains sample interlinear XML (e.g. `Interlinear_en_MAT.xml`) for development and tests
+- `test-data/` contains sample Paratext 9 interlinear data for development and tests: `Pt9InterlinearProjectData.json` is the served payload the converter's tests read, and `test-data/pt9-projects/` holds whole Paratext 9 projects for testing an import by hand (see its [README](test-data/pt9-projects/README.md))
 - `.github/` contains files to facilitate integration with GitHub
   - `.github/workflows` contains [GitHub Actions](https://github.com/features/actions) workflows for automating various processes in this repo (e.g. **Test** and **Lint** on push/PR to main, release-prep, hotfix-\*; **Publish** and **Bump Versions** manual dispatch; **CodeQL** for security)
   - `.github/assets/release-body.md` is the template for the body of [releases published using GitHub Actions](#publishing). The Publish workflow substitutes its version placeholders into a copy outside the repo, and that copy plus a generated changelog becomes the release body
diff --git a/test-data/pt9-projects/PIA/51PHPPIA.SFM b/test-data/pt9-projects/PIA/51PHPPIA.SFM
new file mode 100644
index 00000000..21f7c674
--- /dev/null
+++ b/test-data/pt9-projects/PIA/51PHPPIA.SFM
@@ -0,0 +1,12 @@
+\id PHP - PT9 Import A
+\h PIA
+\mt1 Philippians
+\c 1
+\p
+\v 1 Wug blicket wug dax fep gorp.
+\v 2 Tomo zav flib.
+\v 3 Wugs daxes glorp zav flib.
+\v 4 Zim zam zim zam kex.
+\v 5 Nol pim tuk vex.
+\v 6 Snee plovs vex plovs.
+\v 7 Plovs snee vex plovs.
diff --git a/test-data/pt9-projects/PIA/InterlinearSetup.xml b/test-data/pt9-projects/PIA/InterlinearSetup.xml
new file mode 100644
index 00000000..270769ec
--- /dev/null
+++ b/test-data/pt9-projects/PIA/InterlinearSetup.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearSetupList>
+  <InterlinearSetup type="BackTranslation" language="es">
+    <FontSize>12</FontSize>
+    <RightToLeft>false</RightToLeft>
+    <RelatedLanguages>false</RelatedLanguages>
+    <ExportOnApprove>false</ExportOnApprove>
+  </InterlinearSetup>
+  <InterlinearSetup type="Glossing" language="fr">
+    <FontSize>12</FontSize>
+    <RightToLeft>false</RightToLeft>
+    <RelatedLanguages>false</RelatedLanguages>
+    <ExportOnApprove>false</ExportOnApprove>
+  </InterlinearSetup>
+</InterlinearSetupList>
diff --git a/test-data/pt9-projects/PIA/Interlinear_es/Interlinear_es_PHP.xml b/test-data/pt9-projects/PIA/Interlinear_es/Interlinear_es_PHP.xml
new file mode 100644
index 00000000..5aab570a
--- /dev/null
+++ b/test-data/pt9-projects/PIA/Interlinear_es/Interlinear_es_PHP.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData Hash="pia-words-approved-hash">
+        <Cluster><Range Index="0" Length="3" /><Lexeme Id="Word:wug" GlossId="s-wug1" /></Cluster>
+        <Cluster><Range Index="4" Length="7" /><Lexeme Id="Word:blicket" GlossId="s-blicket" /></Cluster>
+        <Cluster><Range Index="12" Length="3" /><Lexeme Id="Word:wug" /></Cluster>
+        <Cluster><Range Index="16" Length="7" /><Lexeme Id="Phrase:dax fep" GlossId="s-daxfep" /></Cluster>
+        <Cluster><Range Index="24" Length="4" /><Lexeme Id="Word:gorp" GlossId="s-nonexistent" /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:2</string>
+      <VerseData Hash="pia-approved-hash">
+        <Cluster><Range Index="0" Length="4" /><Lexeme Id="Word:tomo" GlossId="s-tomo" /><Excluded>true</Excluded></Cluster>
+        <Cluster><Range Index="5" Length="3" /><Lexeme Id="Word:zav" /></Cluster>
+        <Cluster><Range Index="9" Length="4" /><Lexeme Id="Word:flib" GlossId="s-flib" /></Cluster>
+        <Punctuation><Range Index="13" Length="1" /><BeforeText>.</BeforeText><AfterText>;</AfterText></Punctuation>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:3</string>
+      <VerseData Hash="pia-parses-approved-hash">
+        <Cluster><Range Index="0" Length="4" /><Lexeme Id="Stem:wug" /><Lexeme Id="Suffix:s" /></Cluster>
+        <Cluster><Range Index="5" Length="5" /><Lexeme Id="Stem:dax" /><Lexeme Id="Suffix:es" /></Cluster>
+        <Cluster><Range Index="11" Length="5" /><Lexeme Id="Word:glorp" GlossId="s-glorp" /></Cluster>
+        <Cluster><Range Index="11" Length="5" /><Lexeme Id="Stem:glorp" /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:4</string>
+      <VerseData Hash="pia-phrase-approved-hash">
+        <Cluster><Range Index="0" Length="7" /><Lexeme Id="Phrase:zim zam" GlossId="s-zimzam" /></Cluster>
+        <Cluster><Range Index="4" Length="7" /><Lexeme Id="Phrase:zam zim" GlossId="s-zamzim" /></Cluster>
+        <Cluster><Range Index="8" Length="7" /><Lexeme Id="Phrase:zim zam" GlossId="s-zimzam" /><Excluded>true</Excluded></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:5</string>
+      <VerseData Hash="pia-es-only-hash">
+        <Cluster><Range Index="0" Length="11" /><Lexeme Id="Phrase:nol pim tuk" GlossId="s-nolpimtuk" /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:6</string>
+      <VerseData Hash="pia-plovs-twins-hash">
+        <Cluster><Range Index="5" Length="5" /><Lexeme Id="Word:plovs" GlossId="s-plovs" /></Cluster>
+        <Cluster><Range Index="5" Length="5" /><Lexeme Id="Stem:plov" /><Lexeme Id="Suffix:s" /></Cluster>
+        <Cluster><Range Index="15" Length="5" /><Lexeme Id="Word:plovs" GlossId="s-plovs" /></Cluster>
+        <Cluster><Range Index="15" Length="5" /><Lexeme Id="Stem:plov" /><Lexeme Id="Suffix:s" /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:7</string>
+      <VerseData Hash="pia-plovs-variants-hash">
+        <Cluster><Range Index="0" Length="5" /><Lexeme Id="Word:plovs" GlossId="s-plovs" /></Cluster>
+        <Cluster><Range Index="15" Length="5" /><Lexeme Id="Word:plovs" GlossId="s-plovs-alt" /></Cluster>
+        <Cluster><Range Index="15" Length="5" /><Lexeme Id="Stem:plov" /><Lexeme Id="Suffix:s" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIA/Interlinear_fr/Interlinear_fr_PHP.xml b/test-data/pt9-projects/PIA/Interlinear_fr/Interlinear_fr_PHP.xml
new file mode 100644
index 00000000..4c512ab2
--- /dev/null
+++ b/test-data/pt9-projects/PIA/Interlinear_fr/Interlinear_fr_PHP.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="fr" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData Hash="pia-fr-words-approved-hash">
+        <Cluster><Range Index="0" Length="3" /><Lexeme Id="Word:wug" GlossId="s-wug1" /></Cluster>
+        <Cluster><Range Index="4" Length="7" /><Lexeme Id="Word:blicket" GlossId="s-blicket-fr" /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:3</string>
+      <VerseData>
+        <Cluster><Range Index="5" Length="5" /><Lexeme Id="Stem:daxes" /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:4</string>
+      <VerseData Hash="pia-fr-kex-approved-hash">
+        <Cluster><Range Index="16" Length="3" /><Lexeme Id="Stem:kex" /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 1:5</string>
+      <VerseData>
+        <Cluster><Range Index="0" Length="11" /><Lexeme Id="Phrase:nol pim tuk" GlossId="s-nolpimtuk-fr" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIA/Lexicon.xml b/test-data/pt9-projects/PIA/Lexicon.xml
new file mode 100644
index 00000000..3c1c9ff8
--- /dev/null
+++ b/test-data/pt9-projects/PIA/Lexicon.xml
@@ -0,0 +1,174 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Lexicon>
+  <Language>en</Language>
+  <FontName>Charis SIL</FontName>
+  <FontSize>12</FontSize>
+  <Analyses>
+    <item>
+      <string>flibs</string>
+      <ArrayOfLexeme>
+        <Lexeme Type="Stem" Form="flib" Homograph="1" />
+        <Lexeme Type="Suffix" Form="s" Homograph="1" />
+      </ArrayOfLexeme>
+    </item>
+  </Analyses>
+  <Entries>
+    <item>
+      <Lexeme Type="Word" Form="wug" Homograph="1" />
+      <Entry>
+        <Sense Id="s-wug1">
+          <Gloss Language="es">uno</Gloss>
+          <Gloss Language="fr">un</Gloss>
+        </Sense>
+        <Sense Id="s-wug2">
+          <Gloss Language="es">primero</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="blicket" Homograph="1" />
+      <Entry>
+        <Sense Id="s-blicket">
+          <Gloss Language="es">dos</Gloss>
+        </Sense>
+        <Sense Id="s-blicket-fr">
+          <Gloss Language="fr">deux</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Phrase" Form="dax fep" Homograph="1" />
+      <Entry>
+        <Sense Id="s-daxfep">
+          <Gloss Language="es">tres cuatro</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Phrase" Form="zim zam" Homograph="1" />
+      <Entry>
+        <Sense Id="s-zimzam">
+          <Gloss Language="es">nueve diez</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Phrase" Form="zam zim" Homograph="1" />
+      <Entry>
+        <Sense Id="s-zamzim">
+          <Gloss Language="es">diez nueve</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Phrase" Form="nol pim tuk" Homograph="1" />
+      <Entry>
+        <Sense Id="s-nolpimtuk">
+          <Gloss Language="es">once doce trece</Gloss>
+        </Sense>
+        <Sense Id="s-nolpimtuk-fr">
+          <Gloss Language="fr">onze douze treize</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="gorp" Homograph="1" />
+      <Entry>
+        <Sense Id="s-gorp">
+          <Gloss Language="es">cinco</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="tomo" Homograph="1" />
+      <Entry>
+        <Sense Id="s-tomo">
+          <Gloss Language="es">seis</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="zav" Homograph="1" />
+      <Entry>
+        <Sense Id="s-zav">
+          <Gloss Language="es">siete</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="glorp" Homograph="1" />
+      <Entry>
+        <Sense Id="s-glorp">
+          <Gloss Language="es">ocho</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="plovs" Homograph="1" />
+      <Entry>
+        <Sense Id="s-plovs">
+          <Gloss Language="es">catorce</Gloss>
+        </Sense>
+        <Sense Id="s-plovs-alt">
+          <Gloss Language="es">decimocuarto</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Stem" Form="wug" Homograph="1" />
+      <Entry>
+        <Sense Id="s-stem-wug">
+          <Gloss Language="es">wug</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Suffix" Form="s" Homograph="1" />
+      <Entry>
+        <Sense Id="s-suffix-s">
+          <Gloss Language="es">-s</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Stem" Form="dax" Homograph="1" />
+      <Entry>
+        <Sense Id="s-stem-dax">
+          <Gloss Language="es">dax</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Suffix" Form="es" Homograph="1" />
+      <Entry>
+        <Sense Id="s-suffix-es">
+          <Gloss Language="es">-es</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Stem" Form="kex" Homograph="1" />
+      <Entry>
+        <Sense Id="s-stem-kex">
+          <Gloss Language="fr">quinze</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Stem" Form="glorp" Homograph="1" />
+      <Entry>
+        <Sense Id="s-stem-glorp">
+          <Gloss Language="es">glorp</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Stem" Form="plov" Homograph="1" />
+      <Entry>
+        <Sense Id="s-stem-plov">
+          <Gloss Language="es">plov</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+  </Entries>
+</Lexicon>
diff --git a/test-data/pt9-projects/PIA/Settings.xml b/test-data/pt9-projects/PIA/Settings.xml
new file mode 100644
index 00000000..63addbd7
--- /dev/null
+++ b/test-data/pt9-projects/PIA/Settings.xml
@@ -0,0 +1,31 @@
+<ScriptureText>
+  <StyleSheet>usfm.sty</StyleSheet>
+  <Versification>4</Versification>
+  <Language>English</Language>
+  <MinParatextVersion>8.0.100.76</MinParatextVersion>
+  <FullName>PT9 Import A - clean</FullName>
+  <Encoding>65001</Encoding>
+  <Editable>T</Editable>
+  <Copyright />
+  <NormalizationForm>NFC</NormalizationForm>
+  <Name>PIA</Name>
+  <Guid>a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1a1</Guid>
+  <DefaultFont>Charis SIL</DefaultFont>
+  <DefaultFontSize>12</DefaultFontSize>
+  <FontFeatures />
+  <HtmlLanguage />
+  <LanguageIsoCode>en:::</LanguageIsoCode>
+  <FileNameBookNameForm>41MAT</FileNameBookNameForm>
+  <FileNamePrePart />
+  <FileNamePostPart>PIA.SFM</FileNamePostPart>
+  <BiblicalTermsListSetting>Major::BiblicalTerms.xml</BiblicalTermsListSetting>
+  <MatchBasedOnStems>F</MatchBasedOnStems>
+  <AllowReadAccess>F</AllowReadAccess>
+  <AllowSharingWithSLDR>F</AllowSharingWithSLDR>
+  <Visibility>Test</Visibility>
+  <TranslationInfo>Standard::</TranslationInfo>
+  <EncodingConverter />
+  <UsfmVersion>3</UsfmVersion>
+  <BooksPresent>000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000</BooksPresent>
+  <Naming PrePart="" PostPart="PIA.SFM" BookNameForm="41MAT" />
+</ScriptureText>
diff --git a/test-data/pt9-projects/PIA/WordAnalyses.xml b/test-data/pt9-projects/PIA/WordAnalyses.xml
new file mode 100644
index 00000000..4d089f40
--- /dev/null
+++ b/test-data/pt9-projects/PIA/WordAnalyses.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<WordAnalyses>
+  <Entry Word="daxes">
+    <Analysis><Lexeme>Stem:dax</Lexeme><Lexeme>Suffix:es</Lexeme></Analysis>
+  </Entry>
+  <Entry Word="fepped">
+    <Analysis><Lexeme>Stem:fep</Lexeme><Lexeme>Suffix:ped</Lexeme></Analysis>
+  </Entry>
+  <Entry Word="brokenword">
+    <Analysis><Lexeme>brokenid</Lexeme></Analysis>
+  </Entry>
+  <Entry Word="emptyword">
+    <Analysis />
+  </Entry>
+</WordAnalyses>
diff --git a/test-data/pt9-projects/PIA/en.ldml b/test-data/pt9-projects/PIA/en.ldml
new file mode 100644
index 00000000..3cc2aeaf
--- /dev/null
+++ b/test-data/pt9-projects/PIA/en.ldml
@@ -0,0 +1 @@
+<ldml><identity><version number="" /><generation date="2026-08-28T00:00:00Z" /><language type="en" /></identity><layout><orientation><characterOrder>left-to-right</characterOrder></orientation></layout></ldml>
diff --git a/test-data/pt9-projects/PIA/unique.id b/test-data/pt9-projects/PIA/unique.id
new file mode 100644
index 00000000..4fe808d8
--- /dev/null
+++ b/test-data/pt9-projects/PIA/unique.id
@@ -0,0 +1 @@
+aaaaaaaa-1111-4111-8111-aaaaaaaaaaaa
diff --git a/test-data/pt9-projects/PIB/51PHPPIB.SFM b/test-data/pt9-projects/PIB/51PHPPIB.SFM
new file mode 100644
index 00000000..517df09f
--- /dev/null
+++ b/test-data/pt9-projects/PIB/51PHPPIB.SFM
@@ -0,0 +1,6 @@
+\id PHP - PT9 Import B
+\h PIB
+\mt1 Philippians
+\c 1
+\p
+\v 1 Alpha beta gamma delta.
diff --git a/test-data/pt9-projects/PIB/InterlinearSetup.xml b/test-data/pt9-projects/PIB/InterlinearSetup.xml
new file mode 100644
index 00000000..fe146674
--- /dev/null
+++ b/test-data/pt9-projects/PIB/InterlinearSetup.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearSetupList>
+  <InterlinearSetup type="Glossing" language="es">
+    <FontSize>12</FontSize>
+    <RightToLeft>false</RightToLeft>
+    <RelatedLanguages>false</RelatedLanguages>
+    <ExportOnApprove>false</ExportOnApprove>
+  </InterlinearSetup>
+</InterlinearSetupList>
diff --git a/test-data/pt9-projects/PIB/Interlinear_es/Interlinear_es_JAS.xml b/test-data/pt9-projects/PIB/Interlinear_es/Interlinear_es_JAS.xml
new file mode 100644
index 00000000..80897785
--- /dev/null
+++ b/test-data/pt9-projects/PIB/Interlinear_es/Interlinear_es_JAS.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es" BookId="JAS">
+  <Verses>
+    <item>
+      <string>JAS 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="0" Length="5" /><Lexeme Id="Word:alpha" GlossId="s-alpha" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIB/Interlinear_es/Interlinear_es_PHP.xml b/test-data/pt9-projects/PIB/Interlinear_es/Interlinear_es_PHP.xml
new file mode 100644
index 00000000..fa14f7f5
--- /dev/null
+++ b/test-data/pt9-projects/PIB/Interlinear_es/Interlinear_es_PHP.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData Hash="pib-approved-hash">
+        <Cluster><Range Index="0" Length="5" /><Lexeme Id="Word:alpha" GlossId="s-alpha" /></Cluster>
+        <Cluster><Range Index="6" Length="4" /><Lexeme Id="Word:beta" GlossId="s-beta" /></Cluster>
+        <Cluster><Range Index="6" Length="4" /><Lexeme Id="Word:beta" GlossId="s-beta" /></Cluster>
+        <Cluster><Range Index="11" Length="5" /><Lexeme Id="Word:notinthetext" /></Cluster>
+        <Cluster><Range Index="17" Length="5" /><Lexeme Id="Lemma:delta" /></Cluster>
+        <Cluster><Range Index="23" Length="1" /><Lexeme Id="Infix:x" /></Cluster>
+        <Cluster><Range Index="25" Length="3" /><Lexeme Id="brokenid" /></Cluster>
+        <Cluster><Range Index="29" Length="3" /><Lexeme /></Cluster>
+        <Cluster><Range Index="11" Length="11" /><Lexeme Id="Phrase:gamma delta" GlossId="s-gammadelta" /></Cluster>
+        <Cluster><Range Index="30" Length="8" /><Lexeme Id="Phrase:zeta eta" /></Cluster>
+        <Cluster><Range Index="40" Length="1" /><Lexeme Id="Phrase: " /></Cluster>
+      </VerseData>
+    </item>
+    <item>
+      <string>PHP 2:5</string>
+      <VerseData>
+        <Cluster><Range Index="0" Length="5" /><Lexeme Id="Word:alpha" GlossId="s-alpha" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIB/Lexicon.xml b/test-data/pt9-projects/PIB/Lexicon.xml
new file mode 100644
index 00000000..b73ab02d
--- /dev/null
+++ b/test-data/pt9-projects/PIB/Lexicon.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Lexicon>
+  <Language>en</Language>
+  <FontName>Charis SIL</FontName>
+  <FontSize>12</FontSize>
+  <Analyses />
+  <Entries>
+    <item>
+      <Lexeme Type="Word" Form="alpha" Homograph="1" />
+      <Entry>
+        <Sense Id="s-alpha">
+          <Gloss Language="es">alfa</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="beta" Homograph="1" />
+      <Entry>
+        <Sense Id="s-beta">
+          <Gloss Language="es">beta</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Lemma" Form="delta" Homograph="1" />
+      <Entry>
+        <Sense Id="s-delta">
+          <Gloss Language="es">delta</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Phrase" Form="gamma delta" Homograph="1" />
+      <Entry>
+        <Sense Id="s-gammadelta">
+          <Gloss Language="es">gama delta</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+  </Entries>
+</Lexicon>
diff --git a/test-data/pt9-projects/PIB/Settings.xml b/test-data/pt9-projects/PIB/Settings.xml
new file mode 100644
index 00000000..eaf6e0be
--- /dev/null
+++ b/test-data/pt9-projects/PIB/Settings.xml
@@ -0,0 +1,31 @@
+<ScriptureText>
+  <StyleSheet>usfm.sty</StyleSheet>
+  <Versification>4</Versification>
+  <Language>English</Language>
+  <MinParatextVersion>8.0.100.76</MinParatextVersion>
+  <FullName>PT9 Import B - drops</FullName>
+  <Encoding>65001</Encoding>
+  <Editable>T</Editable>
+  <Copyright />
+  <NormalizationForm>NFC</NormalizationForm>
+  <Name>PIB</Name>
+  <Guid>b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2</Guid>
+  <DefaultFont>Charis SIL</DefaultFont>
+  <DefaultFontSize>12</DefaultFontSize>
+  <FontFeatures />
+  <HtmlLanguage />
+  <LanguageIsoCode>en:::</LanguageIsoCode>
+  <FileNameBookNameForm>41MAT</FileNameBookNameForm>
+  <FileNamePrePart />
+  <FileNamePostPart>PIB.SFM</FileNamePostPart>
+  <BiblicalTermsListSetting>Major::BiblicalTerms.xml</BiblicalTermsListSetting>
+  <MatchBasedOnStems>F</MatchBasedOnStems>
+  <AllowReadAccess>F</AllowReadAccess>
+  <AllowSharingWithSLDR>F</AllowSharingWithSLDR>
+  <Visibility>Test</Visibility>
+  <TranslationInfo>Standard::</TranslationInfo>
+  <EncodingConverter />
+  <UsfmVersion>3</UsfmVersion>
+  <BooksPresent>000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000</BooksPresent>
+  <Naming PrePart="" PostPart="PIB.SFM" BookNameForm="41MAT" />
+</ScriptureText>
diff --git a/test-data/pt9-projects/PIB/en.ldml b/test-data/pt9-projects/PIB/en.ldml
new file mode 100644
index 00000000..3cc2aeaf
--- /dev/null
+++ b/test-data/pt9-projects/PIB/en.ldml
@@ -0,0 +1 @@
+<ldml><identity><version number="" /><generation date="2026-08-28T00:00:00Z" /><language type="en" /></identity><layout><orientation><characterOrder>left-to-right</characterOrder></orientation></layout></ldml>
diff --git a/test-data/pt9-projects/PIB/unique.id b/test-data/pt9-projects/PIB/unique.id
new file mode 100644
index 00000000..dc9b6f71
--- /dev/null
+++ b/test-data/pt9-projects/PIB/unique.id
@@ -0,0 +1 @@
+bbbbbbbb-2222-4222-8222-bbbbbbbbbbbb
diff --git a/test-data/pt9-projects/PIC/51PHPPIC.SFM b/test-data/pt9-projects/PIC/51PHPPIC.SFM
new file mode 100644
index 00000000..29f45944
--- /dev/null
+++ b/test-data/pt9-projects/PIC/51PHPPIC.SFM
@@ -0,0 +1,6 @@
+\id PHP - PT9 Import C
+\h PIC
+\mt1 Philippians
+\c 1
+\p
+\v 1 Uno dos tres.
diff --git a/test-data/pt9-projects/PIC/Interlinear_English/Interlinear_English_PHP.xml b/test-data/pt9-projects/PIC/Interlinear_English/Interlinear_English_PHP.xml
new file mode 100644
index 00000000..78fb4c7c
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Interlinear_English/Interlinear_English_PHP.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="English" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="0" Length="3" /><Lexeme Id="Word:uno" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIC/Interlinear_es-MX/Interlinear_es-MX_PHP.xml b/test-data/pt9-projects/PIC/Interlinear_es-MX/Interlinear_es-MX_PHP.xml
new file mode 100644
index 00000000..673d720c
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Interlinear_es-MX/Interlinear_es-MX_PHP.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es-MX" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="8" Length="4" /><Lexeme Id="Word:tres" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIC/Interlinear_es/Interlinear_es_PHP.xml b/test-data/pt9-projects/PIC/Interlinear_es/Interlinear_es_PHP.xml
new file mode 100644
index 00000000..819b769a
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Interlinear_es/Interlinear_es_PHP.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="0" Length="3" /><Lexeme Id="Word:uno" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIC/Interlinear_es_PHP.xml b/test-data/pt9-projects/PIC/Interlinear_es_PHP.xml
new file mode 100644
index 00000000..c49c9e65
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Interlinear_es_PHP.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="4" Length="3" /><Lexeme Id="Word:dos" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIC/Interlinear_esmx_alt.xml b/test-data/pt9-projects/PIC/Interlinear_esmx_alt.xml
new file mode 100644
index 00000000..3209f124
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Interlinear_esmx_alt.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es-mx" BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="8" Length="4" /><Lexeme Id="Word:tres" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIC/Interlinear_nobookid.xml b/test-data/pt9-projects/PIC/Interlinear_nobookid.xml
new file mode 100644
index 00000000..947ac9ab
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Interlinear_nobookid.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData GlossLanguage="es">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="0" Length="3" /><Lexeme Id="Word:uno" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIC/Interlinear_noglosslang.xml b/test-data/pt9-projects/PIC/Interlinear_noglosslang.xml
new file mode 100644
index 00000000..d858c6c9
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Interlinear_noglosslang.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<InterlinearData BookId="PHP">
+  <Verses>
+    <item>
+      <string>PHP 1:1</string>
+      <VerseData>
+        <Cluster><Range Index="0" Length="3" /><Lexeme Id="Word:uno" /></Cluster>
+      </VerseData>
+    </item>
+  </Verses>
+</InterlinearData>
diff --git a/test-data/pt9-projects/PIC/Lexicon.xml b/test-data/pt9-projects/PIC/Lexicon.xml
new file mode 100644
index 00000000..37e794fd
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Lexicon.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Lexicon>
+  <Language>en</Language>
+  <FontName>Charis SIL</FontName>
+  <FontSize>12</FontSize>
+  <Analyses />
+  <Entries>
+    <item>
+      <Lexeme Type="Word" Form="uno" Homograph="1" />
+      <Entry>
+        <Sense Id="s-uno">
+          <Gloss Language="es">uno</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="dos" Homograph="1" />
+      <Entry>
+        <Sense Id="s-dos">
+          <Gloss Language="es">dos</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+    <item>
+      <Lexeme Type="Word" Form="tres" Homograph="1" />
+      <Entry>
+        <Sense Id="s-tres">
+          <Gloss Language="es">tres</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+  </Entries>
+</Lexicon>
diff --git a/test-data/pt9-projects/PIC/Settings.xml b/test-data/pt9-projects/PIC/Settings.xml
new file mode 100644
index 00000000..b2def3a0
--- /dev/null
+++ b/test-data/pt9-projects/PIC/Settings.xml
@@ -0,0 +1,31 @@
+<ScriptureText>
+  <StyleSheet>usfm.sty</StyleSheet>
+  <Versification>4</Versification>
+  <Language>English</Language>
+  <MinParatextVersion>8.0.100.76</MinParatextVersion>
+  <FullName>PT9 Import C - identity</FullName>
+  <Encoding>65001</Encoding>
+  <Editable>T</Editable>
+  <Copyright />
+  <NormalizationForm>NFC</NormalizationForm>
+  <Name>PIC</Name>
+  <Guid>c3c3c3c3c3c3c3c3c3c3c3c3c3c3c3c3c3c3c3c3</Guid>
+  <DefaultFont>Charis SIL</DefaultFont>
+  <DefaultFontSize>12</DefaultFontSize>
+  <FontFeatures />
+  <HtmlLanguage />
+  <LanguageIsoCode>en:::</LanguageIsoCode>
+  <FileNameBookNameForm>41MAT</FileNameBookNameForm>
+  <FileNamePrePart />
+  <FileNamePostPart>PIC.SFM</FileNamePostPart>
+  <BiblicalTermsListSetting>Major::BiblicalTerms.xml</BiblicalTermsListSetting>
+  <MatchBasedOnStems>F</MatchBasedOnStems>
+  <AllowReadAccess>F</AllowReadAccess>
+  <AllowSharingWithSLDR>F</AllowSharingWithSLDR>
+  <Visibility>Test</Visibility>
+  <TranslationInfo>Standard::</TranslationInfo>
+  <EncodingConverter />
+  <UsfmVersion>3</UsfmVersion>
+  <BooksPresent>000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000</BooksPresent>
+  <Naming PrePart="" PostPart="PIC.SFM" BookNameForm="41MAT" />
+</ScriptureText>
diff --git a/test-data/pt9-projects/PIC/en.ldml b/test-data/pt9-projects/PIC/en.ldml
new file mode 100644
index 00000000..3cc2aeaf
--- /dev/null
+++ b/test-data/pt9-projects/PIC/en.ldml
@@ -0,0 +1 @@
+<ldml><identity><version number="" /><generation date="2026-08-28T00:00:00Z" /><language type="en" /></identity><layout><orientation><characterOrder>left-to-right</characterOrder></orientation></layout></ldml>
diff --git a/test-data/pt9-projects/PIC/unique.id b/test-data/pt9-projects/PIC/unique.id
new file mode 100644
index 00000000..e0364517
--- /dev/null
+++ b/test-data/pt9-projects/PIC/unique.id
@@ -0,0 +1 @@
+cccccccc-3333-4333-8333-cccccccccccc
diff --git a/test-data/pt9-projects/PID/51PHPPID.SFM b/test-data/pt9-projects/PID/51PHPPID.SFM
new file mode 100644
index 00000000..8618c146
--- /dev/null
+++ b/test-data/pt9-projects/PID/51PHPPID.SFM
@@ -0,0 +1,6 @@
+\id PHP - PT9 Import D
+\h PID
+\mt1 Philippians
+\c 1
+\p
+\v 1 Solo texto aqui.
diff --git a/test-data/pt9-projects/PID/Lexicon.xml b/test-data/pt9-projects/PID/Lexicon.xml
new file mode 100644
index 00000000..62104c39
--- /dev/null
+++ b/test-data/pt9-projects/PID/Lexicon.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Lexicon>
+  <Language>en</Language>
+  <FontName>Charis SIL</FontName>
+  <FontSize>12</FontSize>
+  <Analyses>
+    <item>
+      <string>texto</string>
+      <ArrayOfLexeme>
+        <Lexeme Type="Stem" Form="text" Homograph="1" />
+        <Lexeme Type="Suffix" Form="o" Homograph="1" />
+      </ArrayOfLexeme>
+    </item>
+  </Analyses>
+  <Entries>
+    <item>
+      <Lexeme Type="Word" Form="solo" Homograph="1" />
+      <Entry>
+        <Sense Id="s-solo">
+          <Gloss Language="es">solo</Gloss>
+        </Sense>
+      </Entry>
+    </item>
+  </Entries>
+</Lexicon>
diff --git a/test-data/pt9-projects/PID/Settings.xml b/test-data/pt9-projects/PID/Settings.xml
new file mode 100644
index 00000000..77ef6ac7
--- /dev/null
+++ b/test-data/pt9-projects/PID/Settings.xml
@@ -0,0 +1,31 @@
+<ScriptureText>
+  <StyleSheet>usfm.sty</StyleSheet>
+  <Versification>4</Versification>
+  <Language>English</Language>
+  <MinParatextVersion>8.0.100.76</MinParatextVersion>
+  <FullName>PT9 Import D - lexicon only</FullName>
+  <Encoding>65001</Encoding>
+  <Editable>T</Editable>
+  <Copyright />
+  <NormalizationForm>NFC</NormalizationForm>
+  <Name>PID</Name>
+  <Guid>d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4d4</Guid>
+  <DefaultFont>Charis SIL</DefaultFont>
+  <DefaultFontSize>12</DefaultFontSize>
+  <FontFeatures />
+  <HtmlLanguage />
+  <LanguageIsoCode>en:::</LanguageIsoCode>
+  <FileNameBookNameForm>41MAT</FileNameBookNameForm>
+  <FileNamePrePart />
+  <FileNamePostPart>PID.SFM</FileNamePostPart>
+  <BiblicalTermsListSetting>Major::BiblicalTerms.xml</BiblicalTermsListSetting>
+  <MatchBasedOnStems>F</MatchBasedOnStems>
+  <AllowReadAccess>F</AllowReadAccess>
+  <AllowSharingWithSLDR>F</AllowSharingWithSLDR>
+  <Visibility>Test</Visibility>
+  <TranslationInfo>Standard::</TranslationInfo>
+  <EncodingConverter />
+  <UsfmVersion>3</UsfmVersion>
+  <BooksPresent>000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000</BooksPresent>
+  <Naming PrePart="" PostPart="PID.SFM" BookNameForm="41MAT" />
+</ScriptureText>
diff --git a/test-data/pt9-projects/PID/WordAnalyses.xml b/test-data/pt9-projects/PID/WordAnalyses.xml
new file mode 100644
index 00000000..35c076c2
--- /dev/null
+++ b/test-data/pt9-projects/PID/WordAnalyses.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<WordAnalyses>
+  <Entry Word="aqui">
+    <Analysis><Lexeme>Stem:aqu</Lexeme><Lexeme>Suffix:i</Lexeme></Analysis>
+  </Entry>
+</WordAnalyses>
diff --git a/test-data/pt9-projects/PID/en.ldml b/test-data/pt9-projects/PID/en.ldml
new file mode 100644
index 00000000..3cc2aeaf
--- /dev/null
+++ b/test-data/pt9-projects/PID/en.ldml
@@ -0,0 +1 @@
+<ldml><identity><version number="" /><generation date="2026-08-28T00:00:00Z" /><language type="en" /></identity><layout><orientation><characterOrder>left-to-right</characterOrder></orientation></layout></ldml>
diff --git a/test-data/pt9-projects/PID/unique.id b/test-data/pt9-projects/PID/unique.id
new file mode 100644
index 00000000..830751f9
--- /dev/null
+++ b/test-data/pt9-projects/PID/unique.id
@@ -0,0 +1 @@
+dddddddd-4444-4444-8444-dddddddddddd
diff --git a/test-data/pt9-projects/README.md b/test-data/pt9-projects/README.md
new file mode 100644
index 00000000..86dc0902
--- /dev/null
+++ b/test-data/pt9-projects/README.md
@@ -0,0 +1,58 @@
+# Paratext 9 interlinear test projects
+
+Four minimal Paratext 9 projects for exercising the Paratext 9 interlinear import against a real
+running platform. Each has one book (PHP) and a handful of verses, so an import finishes immediately
+and its report is small enough to read whole.
+
+The verse text is invented for the shapes the import has to handle: a form that repeats within a
+verse, runs of words a phrase can span, forms that divide into a stem and a suffix, forms that recur
+with no cluster of their own, so an analysis approved elsewhere has somewhere to be suggested, and
+one form approved four times over, so its pool bucket holds competing payloads.
+
+Cluster `Range` values are character offsets into the verse text, so changing a verse means
+recomputing every range at or after the change, in every gloss language for that book.
+
+These complement [`../Pt9InterlinearProjectData.json`](../Pt9InterlinearProjectData.json), which is
+the served payload the converter's unit tests read directly. These are whole projects, for what no
+unit test covers:
+
+- the platform reading the files;
+- the import service persisting the result;
+- the WebView presenting it.
+
+The XML schema they follow is documented in
+[`src/parsers/pt9/pt9-xml.md`](../../src/parsers/pt9/pt9-xml.md).
+
+## Using them
+
+1. Copy the project folders into the Platform.Bible project root.
+
+   - On Windows: `%USERPROFILE%\.platform.bible\projects\Paratext 9 Projects\`.
+   - Elsewhere: `~/.platform.bible/projects/Paratext 9 Projects/`.
+   - Alternatively point `PLATFORM_BIBLE_PROJECT_ROOT_FOLDER` at a folder holding them, which leaves
+     your own projects untouched.
+
+2. Start Platform.Bible with the extension (`npm start`).
+3. Open the Interlinearizer on one of the projects and use **Import from Paratext 9**, or invoke
+   `interlinearizer.importPt9Project` with the project's ID directly.
+
+The platform serves this data through the `platformScripture.Pt9Interlinear` projectInterface, which
+is advertised only on unpublished (editable) projects. So a project copied here must load as an
+ordinary editable project, not as a resource.
+
+Project GUIDs and `unique.id` values are fixed rather than generated, so re-copying a project after
+deleting it reuses the same Platform.Bible project ID and any interlinearizer state still keyed to
+it.
+
+## What each project covers
+
+| Project | Purpose       | Key features                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
+| ------- | ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `PIA`   | Happy path    | Two gloss languages (`es`, `fr`) over one book, so records merge across languages and one token's parses conflict; five phrase clusters in `es` (a plain two-word one, one ambiguous between two matching runs, one overlapping an approved run so it demotes to `candidate`, an excluded one, and a three-word one both languages gloss); word parses, including a one-morpheme one on a token the other language leaves alone; a word and a parse cluster sharing one range; verse hashes placed so each analysis shape has at least one approved - and therefore linked - instance, since only an approved link is applied to anything; one verse approved by `es` alone, so the phrase both languages gloss merges back down to `suggested`; an excluded cluster; a punctuation entry; a repeated surface form, for an ambiguous anchor; two unanalyzed tokens whose forms carry an approved analysis elsewhere in the book, for the suggestion pool; one form (`plovs`) approved four times across two verses, once sentence-initially so only case folding files it under the same pool key, giving that key four competing payloads - two alike in gloss and morpheme breakdown, one with that gloss and no breakdown, one with that breakdown under a different gloss; every sense-resolution outcome; every bare-word-analysis outcome |
+| `PIB`   | Cluster drops | All five `clusterDrops` reasons (`formMismatch`, `duplicateCluster`, `lemmaOrOther`, `unparseableLexemeId`, `verseNotFound`); two phrases that drop, one matching no run of words and one whose form is blank, beside a phrase that anchors as a control, in an approved verse so it lands somewhere visible; plus an `Interlinear_es_JAS.xml` for a book the project has no text for, which reports `bookFound: false`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
+| `PIC`   | File identity | A canonical book file beside a non-canonical twin of it (`booksDroppedAsDuplicates`, and the canonical file's data is the data that must survive); one file with no `GlossLanguage` and one with no `BookId` (`booksMissingIdentity`); `GlossLanguage="English"` (`tagIsFallback`); `es-MX` and `es-mx`, which stay separate language groups but resolve onto one tag (`sameTagCollisions`)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
+| `PID`   | Lexicon only  | A `Lexicon.xml` and `WordAnalyses.xml` with no interlinear book file at all: the manifest is non-empty, so the import is offered and succeeds, but the conversion has no book to report on and `report.languages` comes back empty                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
+
+For the remaining case, a project the import must refuse outright, use any project with no
+`Lexicon.xml`, no `WordAnalyses.xml`, and no `Interlinear_*` file. Its manifest is empty, which is
+what makes the import throw rather than create anything.