Disclosure first: I built this, it's my plugin, and it's free on WordPress.org.

I kept seeing TranslatePress users run out of AI words: the free version has a 2,000 AI words limit, and the paid plans count words too (from €99/year for 50,000 AI words on one site, with extra 100,000 words for €24). With several languages that allowance goes quickly.

So I made an add-on that puts a Translate page button in the TranslatePress visual editor. You pick a language, click once, and every untranslated string on that page is sent to the AI you choose, checked, and saved into TranslatePress as a machine translation you can review and edit as usual.

What it does:

• Works with the free TranslatePress plugin. No TranslatePress paid plan or add-on needed.
• Bring your own API key for Claude, ChatGPT, Gemini or Groq. You pay the provider directly at their API rates; there is no subscription and nothing goes through me. Gemini and Groq have free tiers with limits.
• Or use Free basic with no key: it uses the translator built into Chrome and Edge on desktop, so the text never leaves your computer. Quality is basic.
• By default only untranslated strings are sent. Translations you wrote or edited yourself are never overwritten.
• Undo last run and Clear machine translations on this page, both keeping your own edits.
• Every result is checked against the original before it's saved. If the AI changed an HTML tag, link, placeholder like %s or {{name}}, or a shortcode, the string is retried once with stricter instructions, and if it's still wrong it's left untranslated instead of breaking your page.
• Warns when a result looks like the wrong script (for example Latin instead of Cyrillic) or the wrong Chinese variant (Traditional vs Simplified).
• Keys are encrypted per user and never sent to the browser. Administrators only.

What it doesn't do (so nobody is surprised): it translates one page at a time from the editor, not the whole site in one go. Strings shared between pages, like menus, are translated once and reused. It doesn't support DeepL.

Plugin: https://wordpress.org/plugins/melotools-ai-translation-translatepress/

It's brand new, so honest feedback is the most useful thing I can get, especially from people translating into non-Latin scripts. I'll answer questions here.