[Closed] change the mxn and others currency simblue wpml

if I want to change a currency symbol from '$' to the MXN etc,. can I use the snippet like that??

/**
* Change a currency symbol
*/
add_filter('woocommerce_currency_symbol', 'change_existing_currency_symbol', 10, 2);

function change_existing_currency_symbol( $currency_symbol, $currency ) {
switch( $currency ) {
case 'MXN': $currency_symbol = 'MXN'; break;
case 'HKD': $currency_symbol = 'HKD'; break;

}
return $currency_symbol;
}

or like that??

add_filter('woocommerce_currency_symbol', 'change_existing_currency_symbol', 10, 2);

function change_existing_currency_symbol( $currency_symbols) {

$currency_symbols['MXN'] = 'MXN';
$currency_symbols['HKD'] = 'HKD';

return $currency_symbols;
}

can I base it on the list in this link?

https://stackoverflow.com/questions/71849168/how-to-change-woocommerce-currency-symbol-in-wordpress-dashboard

tnx
shaya