The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the Equalang MCP listing page.
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Keywords: document translation, pdf translator, translate pdf keep layout, docx translation, pptx translation, excel translation, epub translation, subtitle translation, srt translator, image translation, video translation, audio transcription, speech to text, ai translator, mcp server, model context protocol, claude mcp, cursor mcp, translation api
Translate the file, keep the layout. An MCP server for Equalang - an AI translator that works on whole files: a PDF comes back as a PDF, a deck as a deck, with tables, images and formulas where they were. It also translates subtitles and pictures, turns audio and video into translated subtitles or a transcript, and translates short texts in bulk. Works in Claude Code, Claude Desktop, Codex, Cursor, Windsurf, Cline, VS Code and every other MCP client.
Sign up at https://equalang.com and create a key at https://equalang.com/api-keys. New accounts start with free credits, enough to put a document through.
The key goes in an environment variable of the MCP client's config, never in a URL. Without a key the server still starts and lists its tools; a tool that needs the key answers with how to get one.
The key can also live once per machine, in ~/.config/equalang/.env, which the Equalang skill reads too:
The server takes EQUALANG_API_KEY from its environment first, and reads the file only when the environment has none: a key in the client config wins, and with the file in place the client config needs no env.
Needs Node 18 or later.
-s user puts it in every project; the default scope, local, loads the server only in the directory the command was run from.
Add this to the client's MCP config - claude_desktop_config.json, ~/.cursor/mcp.json, ~/.codeium/windsurf/mcp_config.json, or the file your client documents:
Prefer a skill? equalang-skill offers the same operations as an Agent Skill - one Python script, nothing to install.
| Tool | What it does |
|---|---|
translate_file | Translate a file (path or public URL) into another language and save the result beside it. |
transcribe_recording | Write down what an audio or video file says, as timed text (SRT, VTT, TXT, JSON). |
translate_text | Translate short texts, in order - or one long text, which Equalang cuts at sentences itself. |
estimate_cost | Upload a file without starting anything; answers with the most a job on it can cost, and a file_id that starts the job without a second upload. Free. |
check_job | Pick a job up again, and save its results once it has finished. |
cancel_job | Stop a queued or running job. A cancelled job is not charged. |
get_credit_balance | The account's credits. |
list_languages | Every language code and name. Needs no key. |
Language codes look like en, zh-CN, ja; list_languages has the full list. A job takes minutes - a tool waits up to wait_seconds (50 s by default, 240 at most), then hands back a job id for check_job to pick up.
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