Display OptinMonster optins based on page language

om-glot-condition.php

add_filter( 'optin_monster_output', 'tgm_om_only_swedish', 100 );
function tgm_om_only_swedish( $optins ) {
    
    // Your function to check for Swedish. Change as necessary.
    if ( ! is_swedish() ) {
        $optins = array();
    }
    
    return $optins;
    
}