Description

MTCodes Translator is a lightweight multilingual plugin with no dependencies and no theme coupling, built by MTCodes.

Unlimited languages — every non-default language is served under its own URL prefix (/bs/, /fr/, /de/, …); the default language stays at the site root.
Works with any builder — the fully rendered HTML is parsed and every text node (plus alt, title, placeholder, aria-label and SEO meta) is swapped against the translations table. Strings without a translation stay in the default language and appear in the admin editor automatically.
SEO-ready — hreflang alternates with x-default on every page, self-referencing canonicals on translated URLs, per-language <html lang> and og:locale, translated <title> and meta description, and language variants of all pages in the core XML sitemap.
Language switcher — [mtml_switcher] shortcode, mtml_switcher() template tag, or build your own with mtml_languages(), mtml_lang_url() and mtml_current_lang().
Importer — optionally imports a theme dictionary file (inc/i18n.php returning array( 'lang' => array( 'key' => 'text' ) )).

Screenshots

Copy the mtcodes-translator folder into wp-content/plugins/.
Activate the plugin.
Configure languages under Settings MTCodes Translator Languages.
Visit any page under a language prefix, then translate the discovered strings under Settings MTCodes Translator Translations.

Do I need to duplicate my pages per language?: No. One page serves all languages; the plugin translates the rendered output per URL.
What happens to untranslated strings?: They are shown in the default language and collected in the admin editor, sorted newest first.

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“MTCodes Translator & Language Switcher” is open source software. The following people have contributed to this plugin.

Initial release: language URL routing, rendered-page translation, string discovery, hreflang/canonical/sitemap SEO, admin editor, theme dictionary importer, switcher shortcode.