Regional -> Edit a lang

In the locale field: there shouldn't be a suffix -utf8

Rationale: the "Locale field" is used as the value of "lang=" in all pages.

Thus a locale field with the value "en-US-utf8" is illegal.

For more info: http://laibcoms.asia/blog/labox/general5/the-language-attribute
Or visit: http://www.w3.org/International/articles/language-tags/

In short what's allowed in the "lang=" attribute:
[list]

en = Generic English

en-US = US English

en-GB = Great Britain English

en-PH = Philippine English

fil = Filipino language

fil-Tglg = Filipino language written in Baybayin/Moro script

bik-bto = Bikolano language of the Iriga dialect

bik-bto-Tglg = Bikolano language of the Iriga dialect written in Baybayin/Moro script

phi-Tglg-mrw = Maranao Philippine Language written in Baybayin/Moro script

[/list:u]

Legal format: language-script-region-variant-extension-privateuse

And so on.

This makes the language "English (US) utf8" wrong because it has a "Locale field" value of "en-US-utf8".

Official Centralized Lang Subtag Registry: http://www.iana.org/assignments/language-subtag-registry
Official Centralized Macrolanguage subtag list: http://www.sil.org/iso639-3/macrolanguages.asp

^_^

A solution if suffixing -utf8 is needed, separate the two functions.
Ie
Create a new field or something for the "lang=" attribute value.
While another field for the -utf8 suffixes.

Normally it shouldn't be a problem at all, but we can not control browsers. There is a risk that current or future browsers may change the way they read illegal "lang=" attribute values. The specification wasn't clear, it simply said that it is at the browser's hand to just drop illegal suffixes or they can opt to ignore the whole value of that lang attribute!! (They should stop writing specifications that doesn't define such cases.)