facetwp translate labels

custom-hooks.php

<?php
/** checks WPML current language if FWP()->facet->http_params['lang'] is not set
 **/
add_filter( 'facetwp_i18n', function( $string ) {
    
    if ( isset( FWP()->facet->http_params['lang'] ) ) {
        $lang = FWP()->facet->http_params['lang'];
    else {
	    $lang = apply_filters( 'wpml_current_language', null );
    }
 
    $translations = [];
    $translations['es']['Products'] = 'Productos';
    $translations['es']['Location'] = 'Ubicación';

    if ( isset( $translations[ $lang ][ $string ] ) ) {
	    return $translations[ $lang ][ $string ];
    }
 
    return $string;
}, 11 );