Show HN: Internationalizationstack – Fix AI Localization Bugs in Claude Code

Developer i18n-agent released i18nstack, an open-source toolset that turns Anthropic's Claude Code into a localization team with CLI tools, slash commands, and 46 language-specific translation skills. The project aims to fix AI localization bugs by providing format conversion, pseudo-translation, validation, and native-quality translations for software internationalization.

i18nstack turns Claude Code into a full localization team: format engineer, QA tester, release gate, and 46 native-quality translators. Three battle-tested CLI tools, five workflow slash commands, and 46 language-specific translation skills for Claude Code https://docs.anthropic.com/en/docs/claude-code , installed with one command. git clone --depth 1 https://github.com/i18n-agent/i18nstack.git ~/.claude/skills/i18nstack && ~/.claude/skills/i18nstack/setup That's it. The setup script installs the CLI tools npm, with Homebrew fallback and registers every skill with Claude Code. | Tool | Role | What it does | |---|---|---| i18n-convert | i18n-pseudo i18n-validate | Command | What it does | |---|---| /i18n-wrap path --framework=... | Scan code for hardcoded user-facing strings and wrap them with the right i18n function next-intl, react-i18next, vue-i18n, angular, svelte, python, ruby, flutter, ios, android . Updates locale files and validates. | /i18n-review path --framework=... | Read-only audit of existing i18n wrapping: over/under-wrapping, split sentences, hardcoded values, quality issues. | /i18n-validate path | Run validation and FIX every finding — placeholder drift, plural forms, missing keys translated properly, never English filler — looping until it passes. | /i18n-convert <file --to <format | Safe conversion workflow: resolve the format slug, dry-run for data-loss warnings, convert, verify key counts round-trip. | /i18n-pseudo <files --preset=... | Generate pseudo locales, wire them into the app as a test locale, and hunt down the hardcoded strings and layout bugs they expose. | Each localize-XX skill is distilled from production translation prompts and enforces native-writer rules: formality registers, particle selection, plural systems, script conventions, and false-friend avoidance. Arabic ar , Bulgarian bg , Bengali bn , Catalan ca , Czech cs , Welsh cy , Danish da , German de , Greek el , Spanish es , Estonian et , Persian fa , Finnish fi , French fr , Irish ga , Hebrew he , Hindi hi , Croatian hr , Hungarian hu , Indonesian id , Icelandic is , Italian it , Japanese ja , Korean ko , Lithuanian lt , Latvian lv , Malay ms , Maltese mt , Dutch nl , Norwegian no , Polish pl , Portuguese pt , Romanian ro , Russian ru , Slovak sk , Slovenian sl , Serbian sr , Swedish sv , Swahili sw , Thai th , Tagalog tl , Turkish tr , Ukrainian uk , Urdu ur , Vietnamese vi , Chinese zh The repo lives at ~/.claude/skills/i18nstack . Setup symlinks each skill directory into ~/.claude/skills/ , so Claude Code discovers them automatically and a single git pull updates everything. ~/.claude/skills/ ├── i18nstack/ ← this repo ├── i18n-convert → i18nstack/i18n-convert ├── i18n-pseudo → i18nstack/i18n-pseudo ├── i18n-validate → i18nstack/i18n-validate ├── localize-ja → i18nstack/localize-ja └── ... 46 localize skills ~/.claude/commands/ ├── i18n-wrap.md → ../skills/i18nstack/commands/i18n-wrap.md ├── i18n-review.md → ../skills/i18nstack/commands/i18n-review.md ├── i18n-validate.md → ../skills/i18nstack/commands/i18n-validate.md ├── i18n-convert.md → ../skills/i18nstack/commands/i18n-convert.md └── i18n-pseudo.md → ../skills/i18nstack/commands/i18n-pseudo.md Ship a new locale end to end: Convert your source file into whatever format the project needs: i18n-convert en.json --to android-xml -o strings.xml Pseudo-translate to prove every string goes through the i18n layer:Load it as a fake locale, screenshot the app: un-bracketed English = hardcoded string. i18n-pseudo en.json --preset layout -o pseudo/ Translate with Claude Code using the matching skill: "translate messages/en.json to Japanese" triggers localize-ja and its native-writer rules. Validate before shipping: i18n-validate ./locales --strict cd ~/.claude/skills/i18nstack && git pull && ./setup cd ~/.claude/skills && find . -maxdepth 1 -type l -lname 'i18nstack/ ' -delete && rm -rf i18nstack cd ~/.claude/commands && find . -maxdepth 1 -type l -lname ' skills/i18nstack/ ' -delete CLI tools: npm uninstall -g @i18n-agent/i18n-convert @i18n-agent/i18n-pseudo @i18n-agent/i18n-validate Claude Code https://docs.anthropic.com/en/docs/claude-code - Node.js/npm or Homebrew for the CLI tools MIT