config.locale is undefined by default

[psd]

Ideally value should be take from browser language preferences:

 http://www.w3.org/International/questions/qa-lang-priorities

Accessing the language from Javascript seems to be available in most browsers using one of:

navigator.language window.navigator.language, navigator.browserLanguage navigator.userLanguage

and defaulted to "en-US" to match the browser default or "en" to match the xml:lang="en" lang="en" attributes.

[MartinBudden]

Actually the language value should be set from the current language, not the browser preference. This is already done by the translation plugins, but is not done by the English default.

[MartinBudden]

Fixed in changeset:4409