Limit language switching only to the Posts page

Maybe you can try to just remove the plugin hook that cause home url to be translated, except on posts page :

add_action('parse_request', function() {
    global $sublanguage;

    if (!is_home()) {

        remove_action('home_url', array($sublanguage, 'translate_home_url'));

    }

}, 11);

(I did not test this code, please use with caution)

@maximeschoeni Thanks for the reply! I basically just want all menus in the site to just stay to the default language and never insert “/es/” into any of the urls. So not just links to the homepage but any link generated within a wp_nav_menu. Is this possible?

@maximeschoeni I have tried the code you’ve suggested and it almost works for what I’m trying to do, however it also removes the language string (e.g. ‘es’) from any get_the_permalink calls within the page. Is there a way to specifically target only the links generated within wp_nav_menu?

@maximeschoeni Sorry to chase this again, but just to say that I have tried the code example you suggested and it does almost do what I need. The only issue is that it also removes the language string (e.g. ‘es’) from any?get_the_permalink?calls within the page. I was wondering if there was a way to specifically target only the links generated within?wp_nav_menu? Thanks again for your help!

Ok, so we need to find one wp hook just before nav_menu is generating and one just after, so we can remove then put back our filter. Fortunately wp_nav_menu() function appears to have both. Lets try this:

add_action('parse_request', function() {
    
    global $sublanguage;

    if (!isset($sublanguage)) return; // this will prevent an error if ever Sublanguage is deactivated.

    if (!is_home()) {

       // this hook is triggered before nav menu are generated
        add_filter('pre_wp_nav_menu', function($null) {

            global $sublanguage;

            remove_filter('home_url', array($sublanguage, 'translate_home_url')); // this is actually not an action but a filter!

            return $null;

        });

        // this one is triggered afterwards: let's put back our filter
        add_filter('wp_nav_menu', function($nav_menu) {

            global $sublanguage;

            add_filter('home_url', array($sublanguage, 'translate_home_url'), 10, 4);

            return $nav_menu;

        });

    }

}, 11);

@maximeschoeni Thanks, that seems to be working correctly! The nav menu items are left untouched but get_permalink and also paginate_links links are keeping the language string in them still.

Thanks again for that code, I’d tried to figure out which action or filter I might be able to use but I didn’t come across that pre_wp_nav_menu filter.