Cookie value changes back to previous value after changing

Question

I have this custom pligin that im using in order to save the user's language preferences. I store it as a cookie like so:

<?php
    
    add_filter( 'init', 'aws_set_language_cookie', 999 );
    function aws_set_language_cookie() {
        global $TRP_LANGUAGE;
        if ( isset( $TRP_LANGUAGE ) ) {
            $result = setcookie( 'language', $TRP_LANGUAGE, time() + ( 30 * DAY_IN_SECONDS ), "/", "" , true, true );
        }
    }
    ?>

Now if you take a look at the website https://ugrandchurch.com/ open cookies in inspect element after switching to Spanish. You will see that a cookie by the name of "language" created which holds the value of "es_ES" is saved but it changes to "en_EN" after 3 seconds.

How can I make sure that the value of Spanish "es_ES" is kept instead of being taken overriten by "en_EN".

The WordPress language plugin used here is by the name of TranslatePress

Answer 1

I didn't see this happening on your site, but I think you could probably remove the variable declaration in front of setcookie(). I didn't see result called used any where in this code. Which makes me wonder if the value is being set because since the variable isn't used.

<?php
    
    add_filter( 'init', 'aws_set_language_cookie', 999 );
    function aws_set_language_cookie() {
        global $TRP_LANGUAGE;
        if ( isset( $TRP_LANGUAGE ) ) {
            setcookie( 'language', $TRP_LANGUAGE, time() + ( 30 * DAY_IN_SECONDS ), "/", "" , true, true );
        }
    }
    ?>

I hope this helps, sorry if it doesn't :)