Edit the ''config/web.php'' folder, under ''components'' put
<code php>
            'formatter' => [
                'dateFormat' => 'dd.MM.yyyy',
                'decimalSeparator' => '.',
                'thousandSeparator' => ',',
                'currencyCode' => 'MYR',
       ],
</code>

Look [[https://en.wikipedia.org/wiki/ISO_4217|here]] for the ISO 4217 Currency Codes