Disable specific payment gateways on a specific language version of your WooCommerce site that's running WPML

functions.php

<?php

function wpml_filter_gateways($gateways){
     if(ICL_LANGUAGE_CODE == 'fr') //Checks if the selected language is French.
          unset($gateways['paypal']); //"remove" paypal
 
     return $gateways; //returns the other payment methods.
}
add_filter('woocommerce_available_payment_gateways','wpml_filter_gateways',1);