KAERIS i18n (kaeris-mcp)

AI localization from your editor — translate an app's string files into 46 languages with placeholder-safe, reproducible output.

AI-native localization over theModel Context Protocol. Give Claude Desktop, Cursor, Claude Code (or any MCP client) the ability to translate your app's strings into46 languages— placeholder-safe, format-aware, incremental, with built-in Translation QA.

The first four tools are local-only (no network call, no cost) — an agent can use them freely to audit and understand a repo's i18n before deciding what (if anything) to translate.

kaeris_translate_filewithincremental=Truekeeps akaeris.locknext to your source file — the same lock the CLI writes, so an agent and a human sharing a repo stay in sync. It records a hash of every source stringplus the settings that produced it: tone, glossary, app context, and the model. That means:

- Edit one string— only that string is re-translated; everything else stays byte-for-byte.
- Change tone, glossary or context— the whole locale is re-translated, never a mix of old and new.
- Change plan— every tier runs the same model (Gemini 2.5 Flash-Lite), so upgrading does not force a re-translation. The lock records the model regardless: the day we change it, the locale is rebuilt in full instead of quietly ending up the work of two models.

Commitkaeris.lockalongside your source file so the agent, your teammates and CI all agree on what is already done.

docker build -t kaeris-mcp . docker run -i --rm -v "$PWD:/work" -w /work kaeris-mcp

The server speaks JSON-RPC over stdin/stdout, so there is no port to expose —-iis what keeps the conversation open. Mount your project at/workand the repo-aware tools (scan_repo,status,list_missing_keys) read it directly; pass-e KAERIS_API_KEY=…for the paid tiers.

Claude Desktop— add toclaude_desktop_config.json(macOS:~/Library/Application Support/Claude/, Windows:%APPDATA%\Claude\):

{ "mcpServers": { "kaeris-i18n": { "command": "kaeris-mcp", "env": { "KAERIS_API_KEY": "kaerisp_optional_for_pro_team" } } } }

Cursor— Settings → MCP → Add, or.cursor/mcp.json:

{ "mcpServers": { "kaeris-i18n": { "command": "kaeris-mcp" } } }

Restart the client; the KAERIS tools appear automatically.

No key is required to try it — the free anonymous tier works out of the box.

- "Translate the strings inlocales/en.jsoninto German, Ukrainian and Japanese."
- "Add French and Spanish translations for these buttons: Save, Cancel, Delete."
- "Only translate the new keys I added to en.json — don't redo the whole file."
- "Check this repo's i18n and tell me what's missing or broken."(scans, then reports status — no API call)
- "We don't have Ukrainian yet — add it."(bootstraps a new locale via translation)

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