I know that there are particular obligations around publishing of information. The Welsh Language Act does mean that when information is published by the Welsh Assembly government, there needs to be dual-language versions, and that of course is a significant undertaking. As regards freedom of information, my expectation would be--but this is not my area of expertise--that the obligation is to make available the information in the form in which it was held.
On March 9th, 2011. See this statement in context.