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I18n Expert

Sets up internationalization in React/Next.js/Vue codebases, replaces hard-coded strings with keys, and validates locale parity, plurals, and formatting.

Dev & CodingIntermediate★ 1,323⑂ 212AI score 9/10Last updated: Aug 8, 2026

What it does

  • Picks and installs a framework-appropriate i18n library (react-i18next, next-intl, vue-i18n), creates the config file and wires the provider at the app root.
  • Runs the bundled scripts/i18n_audit.py to compare t('key') usage in source against locale JSON files and flag missing keys or parity gaps.
  • Uses ripgrep patterns to hunt down raw JSX text plus aria-label, title, and placeholder strings, then swaps them for keys.
  • Handles plurals (_one/_other), preserves placeholders, and pushes date/number formatting through Intl helpers.
  • Maps error codes to localized keys and blocks raw error.message from ever reaching the UI.

Who it's for

  • Developers retrofitting multi-language support into an existing React/Next.js/Vue app.
  • Teams maintaining two or more locales (default en-US + zh-CN) who currently diff key files by hand.
  • Frontend owners who also need a language switcher, locale routing, and localized metadata.

Example uses

  1. "Scan src for hard-coded UI strings, convert them to t() keys, and add entries to both en-US and zh-CN."
  2. "Run the locale audit script and fix every missing or mismatched key until it reports zero."
  3. "Map backend error codes into the errors.* namespace with a localized fallback for unknown codes."

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/daymade/claude-code-skills/HEAD/i18n-expert/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the i18n-expert folder from the GitHub repo daymade/claude-code-skills into my ~/.claude/skills/i18n-expert/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/daymade/claude-code-skills.git && mkdir -p ~/.claude/skills && cp -r claude-code-skills/i18n-expert ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Clone the repo: git clone https://github.com/daymade/claude-code-skills.git
  3. Create the skills folder if needed: mkdir -p ~/.claude/skills
  4. Copy the skill in: cp -r claude-code-skills/i18n-expert ~/.claude/skills/
  5. Confirm scripts/i18n_audit.py came along and that Python 3 is available: python3 --version
  6. Restart Claude Code, then ask something like "audit the i18n coverage in this repo" to trigger the skill.
View source on GitHub ↗License: MIT