Nuzhy/_/translate currency group (#792)

* fix: translate currency group

* fix: currency group translated

Author: Nuzhy-Deriv

src/javascript/app/pages/form/currency-dropdown.jsx

@@ -1,15 +1,21 @@
 import React from 'react';
 import { CustomDropdown, DropdownItem, DropdownTitle, useDropdown } from '@deriv-com/quill-ui';
 import { setDefaultParams } from '../../common/helpers';
+import { localize } from '../../../_common/localize';
 
 const CurrencyContent = ({ currency_list, currency, onUpdate, elementId }) => {
     const { close } = useDropdown();
 
+    const getCurrencyGroupMap = {
+        fiat  : localize('Fiat'),
+        crypto: localize('Crypto'),
+    };
+
     return (
         <div className='custom-dropdown-wrapper'>
             {Object.keys(currency_list).map((key) => (
                 <div key={key}>
-                    <DropdownTitle label={key.toLocaleUpperCase()} />
+                    <DropdownTitle label={getCurrencyGroupMap[key]} />
                     {currency_list[key].map((item) => (
                         <DropdownItem
                             key={item.value}