[Contribution] Undocumented filter pll_the_languages_args

Hey Chouby!

One more time, thank for your awesome work 🙂

I’ve had a task today to add a language switcher to WordPress menu, but the client wanted it to show language code instead of name, like:

Home | About | Contact | DE

instead of

Home | About | Contact | Deutsch

I don’t want to complicate things, and if Polylang provides a standard language switcher for the nav_menus, let’s use it. None of the methods discussed in other topics here worked for this case, so I went to study the code. There’s an undocumented filter pll_the_languages_argsin PLL_Switcher->the_languages() (see here) which perfectly fits for this purpose. Here’s a piece of code that might be useful for others:

/**
 * Display languages as slugs instead of full name.
 *
 * @param $args array Merged array of defaults and user settings for language selector
 *
 * @return array Modified array of arguments
 */
function pss_language_as_slug( $args ) {

	$args['display_names_as'] = 'slug';
	return $args;

}
add_filter( 'pll_the_languages_args', 'pss_language_as_slug', 10, 1 );

It would be nice to document it in filters section on Polylang docs website.

https://ww.wp.xz.cn/plugins/polylang/