Multisite Language Switcher

A simple, powerful, and user-friendly plugin that adds multilingual support to your WordPress multisite installation, whether using multiple subdomains or folders. Multisite Language Switcher allows you to effortlessly manage translations for posts, pages, custom post types, categories, tags, and custom taxonomies.

The plugin uses flag icons from FamFamFam. Thanks to Mark James for his great work. In addition, I would like to thank Jürgen Mayer for creating the plugin’s banner.

Please, don’t forget to rate this plugin! 🙂

Translators

Thanks to all the translators for their great work.

• German (de_DE) – Dennis Ploetner
• Italian (it_IT) – Antonella Cucinelli
• Dutch (nl_NL) – Alexandra Kleijn
• Brazillian Portuguese (pt_BR) – Coolweb
• Spanish (es_ES) – Andreas Breitschopp
• French (fr_FR) – Andreas Breitschopp
• Russian (ru_RU) – Andrey Vystavkin
• Ukrainian (uk) – Victor Melnichenko
• Croatian (hr_HR) – Brankec69
• Romanian (ro_RO) – Armand K
• Polish (pl_PL) – Kamil Frejlich
• Lithuanian (lt_LT) – Ovidijus Pukys
• Catalan (ca_ES) – Joan López
• Czech (cs_CZ) – Rastr
• Hungarian (hu_HU) – RobiG
• Georgian (ka_GE) – Jas Saran
• Greek (el) – Christoforos Aivazidis
• Serbian (sr_RS) – Web Hosting Hub
• Turkish (tr) – Alican Cakil
• Armenian (hy_AM) – Yeghishe Nersisyan
• Bengali (bn_BD) – Md. Nazmul Huda
• Japanese (ja) – ThemeBoy
• Swedish (sv_SE) – Erik Bernskiold
• Traditional & Simplified Chinese (zh_CN & zh_TW) – DrBenson
• Arabic (ar) – Mohamed Elwan
• Norwegian (nb_NO) – Ibrahim Qraiqe
• Bulgarian (bg_BG) – Vencislav Raev
• Mexican Spanish (es_MX) – Fernando Mata

You can translate this plugin on translate.wordpress.org, or if you prefer and have created your language pack, or have an update of an existing one, you can send me your Gettext PO and MO so that I can
bundle it into the Multisite Language Switcher. You can download the latest POT file
from here.

• Use the WordPress admin to install the plugin from there or
• Download the plugin and uncompress it with your preferred unzip programme and copy the entire directory in the plugin directory of your WordPress blog (/wp-content/plugins)
• Activate the plugin in your plugin administration page (by the network administrator on all the blogs or by the blog administrator for each particular blog).
• After activation, configure the plugin once in each blog under Settings -> Multisite Language Switcher

Now you can:

• Connect your translated pages and posts in Posts -> Edit or Pages -> Edit
• Connect your translated categories and tags in Posts -> Categories or Posts -> Tags
• connect your Custom Post Types and Custom Taxonomies across languages
• create a missing translation in one step – straight from the editor metabox, or from the Add from Translation submenu, which lists everything that is not translated yet and can create translations in bulk (Quick Create, new in 3.0)
• use the widget, the Gutenberg block, the shortcode [sc_msls] and/or a content_filter which displays a hint to the user if a translation is available
• you can find also a shortcode for the widget [sc_msls_widget]
• optionally you can place the code <?php if ( function_exists( 'msls_the_switcher' ) ) msls_the_switcher(); ?> directly in your theme files

Review the Multisite Language Switcher Website for more information.
Developers will find the API functions, every action and filter, and a set of integration
snippets in the developer documentation.

1. 

   Plugin configuration with labels

2. 

   Plugin configuration with flag

3. 

   Posts list with label

4. 

   Post list with flag

5. 

   Edit post with label and select2

6. 

   Edit post with flag and dropdown

7. 

   Non-styled output of the widget, block and shortcode

3.0.3

• Fixed: on PHP 7.4 the plugin’s dependencies could not be installed, because one of them required PHP 8. MSLS supports PHP 7.4 again, as documented.

3.0.2

• Fixed: with more than 100 users on a blog, opening the settings page raised a PHP notice that ended up in the error log (and in services such as Sentry). The truncated user list is now reported as a hint below the “Reference user” dropdown instead.
• Changed: MSLS no longer runs count_users() to detect the truncation, which removes a costly query from the settings page on blogs with many users.

3.0.1

• Fixed: 3.0.0 could not be published on WordPress.org
• The plugin code is identical to 3.0.0.

3.0.0

• New: Quick Create – create the translated post straight from the editor metabox, or pick a source post on the new Add from Translation submenu (single and bulk). Backed by a REST endpoint and switchable in the settings.
• New: msls_quick_create_capability lets integrations override the Quick Create permission checks. Additional filters cover the post data, the inserted post, the REST response, the untranslated-posts list and the mapped taxonomy terms.
• New: filter hooks for the AJAX suggest results of the post and term metaboxes.
• New: a developer reference in docs/ – public API, every hook, integration snippets and the Playwright setup.
• Changed: the lloc\Msls\ namespace is split into per-concern sub-namespaces. Every pre-3.0 class name (MslsOptions, MslsLink, MslsOutput, …) keeps working through a backwards-compatibility alias, so add-ons and custom code do not need changes.
• Changed: the public helper functions moved to includes/api.php, and the $attr argument of msls_get_switcher() is now optional.
• Fixed: add-ons such as MslsMenu and MslsSelect could be silently disabled because the plugin registered its classes too late. Aliases and API functions are now available the moment the plugin file is loaded.
• Fixed: authorization is checked on the destination post during content import, and the ContentImporter permission and post type checks were corrected.
• Fixed: no home_url() fallback for taxonomy and query archives anymore.
• Fixed: broken links on the page for the latest posts.
• Fixed: several issues in the blog collection.
• Internal: strict typing throughout, PHPStan level 8 clean, ABSPATH guards, Plugin Check and PHPCS findings addressed, a wp-env based local multisite and a Playwright end-to-end suite.

2.10.1

• Fixed: deprecated function warning pointed to a non-existent function.
• Documentation: README.md code snippets reflect the new function names.

2.10.0

• New: prefixed public helper functions (msls_get_*, msls_the_switcher) with deprecation shims for the legacy names.
• New: action hook names are exposed as constants for safer programmatic use.
• Accessibility: aria-current="page" on the active language link.
• Fixed: path-related issue affecting asset/loader resolution.

The full history is kept in the separate Changelog.