isRtlLanguage method
Check if String is Right to Left Language
Implementation
bool isRtlLanguage() {
final rtlLocaleRegex = RegExp(
r'^(ar|dv|he|iw|fa|nqo|ps|sd|ug|ur|yi|.*[-_]'
r'(Arab|Hebr|Thaa|Nkoo|Tfng))(?!.*[-_](Latn|Cyrl)($|-|_))'
r'($|-|_)',
caseSensitive: false);
final bool rtlCheck = rtlLocaleRegex.hasMatch(this);
return rtlCheck;
}