[feature] create additional english dialect flags

[gsgou]

Similar to this commit following dialects can be useful. Used from services as Microsoft Azure for example :

"en-GH", "English (Ghana)" "en-HK", "English (Hong Kong)" "en-IE", "English (Ireland)" "en-KE", "English (Kenya)" "en-NG", "English (Nigeria)" "en-PH", "English (Philippines)" "en-SG", "English (Singapore)" "en-TZ", "English (Tanzania)"