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feat(docs): add the Japanese locale with an English fallback for API reference - #434

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hyesungoh merged 6 commits into
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feat/japanese-locale-pilot
Aug 25, 2026
Merged

feat(docs): add the Japanese locale with an English fallback for API reference#434
hyesungoh merged 6 commits into
mainfrom
feat/japanese-locale-pilot

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Summary

Adds Japanese (ja) as the third documentation locale.

Adding the locale required one registry entry (localeDefinitions.ja) and one strings file (.vitepress/locales/ja.mts) — the rewrites, sidebar, navigation, language picker, search translations, and fallback generation are all derived from the registry.

What changed in the verifier

  • verifyDocsI18n.ts now asserts ja is registered, its rewrites and generated rewrites resolve, and that it ships search translations (without them the search UI silently renders in English — the field is optional in the type).
  • The synthetic "unregistered locale" fixture moved from ja to zh-Hans so it keeps covering the "buildLocaleConfig works for a locale not in the registry" case now that ja is real.

Translation provenance

The Japanese prose was drafted from the English sources and reviewed by a translation-reviewer agent (added in this PR at .claude/agents/agent-translation-reviewer.md) against a category-based rubric: meaning, glossary, fluency, register, code, link, structure. Every file went through two draft → review → revise rounds; all findings from both rounds were applied.

This has not been reviewed by a human native speaker. Corrections are welcome as follow-up PRs. The reviewer agent's glossary and do-not-translate list are in the repo so they can be corrected the same way.

Search verification

Run against yarn docs:preview on the /ja/ locale, VitePress local search (MiniSearch, default tokenizer):

Query Result
useDebounce hit — useDebounce ranked first
useToggle hit — useToggle ranked first
mergeRefs hit — mergeRefs ranked first
useSafeAreaInset hit — useSafeAreaInset ranked first
ImpressionArea hit — ImpressionArea ranked first
インストール hit — インストール page ranked first
設計原則 hit — 設計原則 page ranked first
依存関係 hit — 設計原則 > 依存関係ゼロによる軽量さと高速さ

8/8. No tokenizer customisation needed for this pilot.

Regression check

Sidebar and navigation link inventories for /core/intro (46 links) and /ko/core/intro (48 links) are byte-identical before and after this change. /ja builds to 66 HTML pages (11 translated + 55 fallback).

Gates

  • yarn test (lint, format, type) ✅
  • yarn test:spec
  • yarn test:docs (real VitePress build + fallback/banner/sidebar assertions) ✅

Known issues

None.

Follow-up

  • API reference translation will land in category-sized PRs (core hooks → core components and utils → mobile). yarn docs:gen currently translates to Korean only (generateDocs/translate.ts hard-codes the target language); parameterising it is a prerequisite.
  • A one-line note on the translation contribution flow belongs in CONTRIBUTING.md once the reviewer agent has been used by someone other than the author.

@changeset-bot

changeset-bot Bot commented Aug 25, 2026

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⚠️ No Changeset found

Latest commit: 5331640

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

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Size Change: 0 B

Total Size: 98.7 kB

ℹ️ View Unchanged
Filename Size
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packages/core/dist/components/ImpressionArea/ImpressionArea.mjs 984 B
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (b202400) to head (5331640).

Additional details and impacted files

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@@            Coverage Diff            @@
##              main      #434   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           58        58           
  Lines         1652      1652           
  Branches       499       499           
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  Hits          1652      1652           
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@hyesungoh
hyesungoh marked this pull request as ready for review August 25, 2026 14:21
@hyesungoh
hyesungoh requested a review from mnxmnz as a code owner August 25, 2026 14:21
Copilot AI lite review requested due to automatic review settings August 25, 2026 14:21

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@hyesungoh
hyesungoh merged commit 22b466f into main Aug 25, 2026
18 checks passed
@hyesungoh
hyesungoh deleted the feat/japanese-locale-pilot branch August 25, 2026 14:26
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3 participants