translate some text using gettext

Hello

i’ve tried to translate some text on my checkout page by following this guidance https://developer.www.ads-software.com/reference/hooks/gettext/ using this code

add_filter( 'gettext', 'repl_wc_text', 999, 3 );
function repl_wc_text( $translated_text, $text, $domain ) {
    if ( ! is_admin() && 'woocommerce' === $domain ) {
        switch ( $translated_text ) {
            case 'City' :
                $translated_text = __( 'Kota', 'storefront' );
            break;
            case 'District' :
                $translated_text = __( 'Kecamatan', 'storefront' );
            break;
        }
    }
    return $translated_text;
}

and i would like to know why the code is not working. is there something wrong with the code ?

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