BallesDev LingoPress makes your WordPress site multilingual with a proven data model (languages and translation groups as taxonomies, no custom tables) and adds AI translation that actually understands your content. Every feature is included — there is no paid tier, license key or locked functionality.
Multilingual core
lang and translations fields on wp/v2, collection filtering with ?lang=.AI translation (optional)
The multilingual features work fully without any API key. AI translation is an optional extra that only runs when you ask for it — see “External services” below.
Developer friendly
lingopress_set_post_language(), lingopress_get_post(), lingopress_the_languages(), lingopress_register_string() and more.lingopress_language_defined, lingopress_ai_system_prompt, lingopress_ai_provider, lingopress_switcher_items, lingopress_sync_post_meta.wp lingopress import-polylang.Copyright 2026 balles.dev. BallesDev LingoPress is free software under the GPL, version 3 or later, with additional terms: copies and modified versions must keep the notice “Originally developed by balles.dev (https://balles.dev/)”, and modified versions must use a different name, without “BallesDev”, “balles.dev” or “LingoPress”. See LICENSE.txt and NOTICE.txt.
LingoPress can translate your content with an AI provider of your choice. This is optional: no request is made to any AI service until a provider is set up — a connector in Settings Connectors (WordPress 7.0+) or an API key in LingoPress AI translation (or its constant in wp-config.php) — and a user with editing permissions starts a translation — from the post editor, the bulk action, the Queue, the Templates tab or the “Translate missing strings with AI” button. Queued jobs run in the background through WP-Cron, but only jobs that a user explicitly queued.
Only the provider selected in the settings receives data. Each request sends the text being translated (post title, content and excerpt; a theme template; or the registered strings), the source and target languages, your site name and tagline, the “Site context” and glossary settings, the post type and the names of the post’s categories and tags, together with your API key to authenticate. No other site or visitor data is sent.
api.anthropic.com) — used when the provider is set to Claude. Terms of service, Privacy policy.generativelanguage.googleapis.com) — used when the provider is set to Gemini. Terms of service, Privacy policy.api.openai.com) — used when the provider is set to OpenAI. Terms of service, Privacy policy.api.groq.com) — used when the provider is set to Groq. Terms of service, Privacy policy.