Reply To: deliver another language file for one user role

[Vladimir]

Hi,

Site admin can install needed language file for WordPress temporally changing site language at the Settings->General page. (Change language, update settings, change language back).

WordPress offers special filter ‘locale’, which allows to automatically change language according your own conditions. You may use code below as a starting point, change ‘author’ role to your own:

// Change site language for a role
add_filter( 'locale', 'change_site_lang_for_role', 10, 1 );

function change_site_lang_for_role( $locale ) {
    
    if ( !is_user_logged_in() ) {
        return $locale;
    }
    
    $user = wp_get_current_user();
    if ( !is_array( $user->roles ) ) {
        return $locale;
    }
    
    if ( in_array('author', $user->roles ) ) {
    
        $locale = 'de_DE';
    }

    return $locale;
}
// end of change_site_lang_for_role()