Hi there
Windows Office 2010 running on W8 will work with all the extra Language packs that were released for W7 .

The Windows Interface language packs themselves (The ones that change the standard Windows display language won't work with these extra languages yet. -- These were the extra ones released in W7 where for example you could have Gaelic as well as Standard English).

So you can have Office 2010 in your chosen language on W8 but you'll have to wait a bit for the Windows interface itself.

I'm interested to see if it will automatically translate the Metro tile groupings that you can manually name or will this have to be done manually).

I tried the W7 versions but these didn't install".