translate method
Translate a key to the current locale
Implementation
String translate(String key, {Map<String, dynamic>? args}) {
String value = _localizedStrings[key]?.toString() ?? key;
if (args != null && args.isNotEmpty) {
args.forEach((key, val) {
value = value.replaceAll('{$key}', val.toString());
});
}
return value;
}