W3c article explaining the use of language tags in html and xml. This is absolutely what I need to be using in my projects, and it is what I have been looking out for.
W3C Internationalization (I18n) Activity works with W3C working groups and liaises with other organizations to make it possible to use Web technologies with different languages, scripts, and cultures.
It is very important that the character encoding of any XML or (X)HTML document is clearly labeled, so that clients can easily map these encodings to Unicode
It is very important that the character encoding of any XML or (X)HTML document is clearly labeled, so that clients can easily map these encodings to Unicode