sam0kc

Okay, I found a solution. It’s actually my “plan B”.

With a <select name=”langageSelect”> in the PHP file, here is the content of the JS file:

document.querySelector('select[name=languageSelect]').onchange = setCookieAndReload;
function setCookieAndReload() {
	MsSepPreferredLanguage = document.querySelector('select[name=languageSelect]').value;
	document.cookie = "preferredLanguage="+MsSepPreferredLanguage;
	window.location.reload(true);
}

This is gonna set a cookie to remind the language preferences of the user..

… and added in the functions.php file:

function wpse_52419_change_language( $locale )
{
    return $_COOKIE['preferredLanguage'];
}
add_filter( 'locale', 'wpse_52419_change_language' );

To precise something: the translations are handled with .po files, in the /language folder of the homemade theme…

It actually doesn’t help, because as said in the first post, the visitors of the website won’t go in the administration panel to set their preferred language