Jun 10, 2010 at 11:52 PM
Edited Jun 11, 2010 at 3:06 AM
I am also having this problem.
My parent site has a language of 1033 (English US) and locale of 3081 (English Australia).
My child site template also has a language of 1033 and a locale of 3081 - I have checked the manifest.xml file.
Yet I still get 'Error creating Site. The language is not supported on the server'.
What else should I check?
OR does your original answer suggest that the locale of the parent i.e. 3081 must be used as the language of the child site?