A snippet from Malcolm Hunter - the British English translator.  You might want to 
take note of his points and remove these from your translations 

Something I've forgotten to mention:

There was discussion sometime ago about use of first person and casual/
IRC-style usage. As much as possible can we try to make the wording more 
professional.

1. I, me, my should be avoided, unless it is the user's response (eg. "Let me 
choose") and can't easily be changed to something else. The program shouldn't 
be saying to the user: "I was unable to...", etc.

2. We is another one, there are 2 examples of this in kget.po ("We are 
online / offline") - who's "We"? I'm not sure what to do with these at the 
moment - depends on the context.

3. The program should not apologise - there is a Sorry function, but the 
actual text shouldn't have the word "Sorry" in it. I'm not sure about 
"Please" either.

4. No IRC emoticons, abbreviations (eg. LOL) - we might get developers 
moaning, but at the end of the day these apps are being used by corporate 
users as well.

5. Same goes for casual, conversational wording (eg. "Oops!" which I recently 
found in a dialog title bar). Same reason as item 4.

With games and amusements where the target user-base is mainly home, we can be 
a bit more relaxed with this as we don't want to spoil the fun aspect.

Thanks,
Malcolm