WMPL – Language switcher – Flags only

Hello WordPress Team,

I’m looking for a solution on how to integrate a language switcher, only with flags, into my website.
I work with wmpl and inserted the proposed code in to function.php (see below) of my Merchant theme. This didn’t lead to desired results. The fact is that I have several themes on the website: https://www.stopp-schnarchen.de. Can anybody advise how to go on? Your reply is very appreciates.

Best regards,

Anastasia

Code:

function language_selector_flags(){
    $languages = icl_get_languages('skip_missing=0&orderby=code');
    if(!empty($languages)){
        foreach($languages as $l){
            if(!$l['active']) echo '<a href="'.$l['url'].'">';
            echo '<img src="'.$l['country_flag_url'].'" height="12" alt="'.$l['language_code'].'" width="18" />';
            if(!$l['active']) echo '</a>';
        }
    }
}

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