Claude Skill MartBrowse skillsQuick linesLearn by videoTerminal guideWhat is a Skill?
 
← Back to list

i18next Localization Setup

Takes an app from hardcoded strings to a fully localized, continuously translated one using i18next-cli and Locize.

Dev & CodingIntermediate★ 234⑂ 36AI score 9/10Last updated: Sep 2, 2026

What it does

  • Runs npx i18next-cli localize --print-agent-prompt so the agent always follows the version-matched workflow instead of a stale copy.
  • Walks the full pipeline: stack detection → init (writes i18next.config.ts) → instrument (AST-wraps hardcoded strings in t()) → extract (generates locale JSON) → locize-sync / locize-download (push keys, AI-translate, pull back).
  • Insists on instrument --dry-run first and a git diff review afterwards (e.g. Next.js server components may need 'use client').
  • Handles stack specifics: Vue via i18next-cli-vue, Svelte via i18next-cli-plugin-svelte, added to the plugins array.
  • Defines hard stops: competing i18n libraries (next-intl, react-intl, vue-i18n, Paraglide, Lingui, Tolgee) or a dirty working tree pause the run and ask the user.

Who it's for

  • Frontend developers internationalizing a React/Next.js/Vue/Svelte app for the first time.
  • Teams whose project already uses i18next but still has hardcoded strings.
  • Teams that want locale files managed in a hosted backend with AI translation.

Examples

  1. "Add i18n to my React app" → verifies i18next + react-i18next are installed, writes config, prints the dry-run plan.
  2. "I want German and French support" → extracts keys, syncs to Locize, AI-translates, downloads translations back into the repo.
  3. "Find hardcoded strings and wrap them" → runs instrument instead of hand-editing, then reviews the diff before extraction.

· · · 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/i18next/i18next-cli/HEAD/skills/i18next-localization/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 skills/i18next-localization folder from the GitHub repo i18next/i18next-cli into my ~/.claude/skills/i18next-localization/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/i18next/i18next-cli.git /tmp/i18next-cli && mkdir -p ~/.claude/skills && cp -r /tmp/i18next-cli/skills/i18next-localization ~/.claude/skills/

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

  1. Open a terminal and clone the repo: git clone https://github.com/i18next/i18next-cli.git /tmp/i18next-cli
  2. Create the skills directory if needed: mkdir -p ~/.claude/skills
  3. Copy the skill in: cp -r /tmp/i18next-cli/skills/i18next-localization ~/.claude/skills/
  4. Confirm bundled reference files (such as references/stacks.md) came along.
  5. Make sure Node.js is available — test with npx i18next-cli --help.
  6. For the Locize part, create a project at https://www.locize.app and export LOCIZE_PROJECTID and LOCIZE_API_KEY as environment variables. Never embed the API key in client-side code.
  7. Restart Claude Code and ask something like "internationalize my app". Commit your work first so the instrumentation diff is reviewable.
View source on GitHub ↗License: MIT