How To Create Custom Currency

On your dashboard, go to Appearance > Editor

Choose “functions.php” to be edited

Add this snippet code

add_filter( 'woocommerce_currencies', 'add_my_currency' );
function add_my_currency( $currencies ) {
$currencies['ABC'] = __( 'Currency name', 'woocommerce' );
return $currencies;
}
add_filter('woocommerce_currency_symbol', 'add_my_currency_symbol', 10, 2);
function add_my_currency_symbol( $currency_symbol, $currency ) {
switch( $currency ) {
case 'ABC': $currency_symbol = '$'; break;
}
return $currency_symbol;
}