Auto-Registered Groups

When Multilang is ON, five field groups appear in wp-admin automatically. Native WP functions (the ones listed under “Swaps”) return the active-language value when a translation exists, and fall back to the native field otherwise.

Group	Applies to	Field	Swaps
Multilang Title	Post types with editor support (except page, attachment)	title_ml	the_title(), get_the_title()
Multilang Featured Image	Post types with thumbnail support (except attachment)	featured_image_ml	get_post_thumbnail_id(), the_post_thumbnail(), has_post_thumbnail()
Multilang Name	All public taxonomies (except nav_menu, link_category, post_format)	name_ml	$term->name, get_the_terms(), wp_get_post_terms(), get_term() — slugs are not translated
Multilang SEO	Post types with publicly_queryable => true	seo_title, seo_description, og_image	Yoast title, description, OG, Twitter, canonical
Multilang Content	Post types with editor support (respects admin_controller_config.php)	content_ml	the_content(), get_the_content()