wp-includes/class-wp-textdomain-registry.php:140Sets the language directory path for a specific domain and locale.
$domainstring$localestring$pathstring|false public function set( $domain, $locale, $path ) { $this->all[ $domain ][ $locale ] = $path ? rtrim( $path, '/' ) . '/' : false; $this->current[ $domain ] = $this->all[ $domain ][ $locale ]; }Introduced in 6.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-textdomain-registry.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.