A fantastic idea for your 10's of thousands (or maybe more) UK users. Why don't Adobe show us a little bit of respect and create a UK localised version of Lightroom/Photoshop etc that uses our native language (ie English). I would think it would be simpler than most other language packs, as probably 99% can be copied across from the US version. They just need to fix the blatant spelling errors such as 'Color' rather than 'Colour'.
As far as I know, Adobe uses International / US English in all their applications. I think Color and Favorite are the only offending terms in Lightroom, and it's not as if it's a word processor. But hey up, maybe we should demand Yorkshire English! And a left hand drive Lightroom too?