Slim Language Switcher – Multilingual Manager with hreflang SEO Tags

Slim Language Switcher helps you present the same content in multiple languages without replacing WordPress’s own language files.

Add the languages you support, assign a default URL to each one, then optionally override those URLs on posts, pages, products, and terms. The plugin outputs a language switcher (shortcode or block) and can print hreflang tags plus JSON-LD for search engines.

Features

• Language directory stored in WordPress options (no custom database tables)
• Light, dark, and auto themes with editable color palettes
• Dropdown, list, and inline layouts
• Live appearance designer with a copyable shortcode
• Language Switcher block with layout and theme controls
• Alternate URL fields on posts, pages, public post types, and public taxonomies
• Optional WooCommerce shop, product category, and product tag support
• Optional hreflang and JSON-LD output

This plugin does not translate content automatically. Pair it with translated pages or a separate translation workflow.

Developer Notes

Render the switcher in a theme:

echo slim_language_switcher_get_switcher( array( 'layout' => 'dropdown', 'theme' => 'auto' ) );

CSS custom properties used by the switcher:

• --mlmgr-bg
• --mlmgr-text
• --mlmgr-border
• --mlmgr-hover-bg
• --mlmgr-hover-text
• --mlmgr-accent
• --mlmgr-radius
• --mlmgr-font-size

Post and term meta key for alternate URLs: _slim_language_switcher_urls.