Here are some lessons I learned about localizing a XBLIG, while trying to help Ultimate Dodgeball navigate through the peer review process.
Localized Games take a long time to get through peer review:
Although Ultimate Dodgeball received many pass votes during review it got stuck in the review process. New pass votes simply didn't seem to count at all. I looked into this, and discovered that I needed two pass votes from every language group that I localized into. Since I also put a game description in French, this meant I needed to find developers who spoke French, German, Spanish and Japanese. I checked the developer profiles of other games in peer review and actively searched out these developers. After an additional week and a half I had received all the votes I needed except for one French vote. If I didn't get that vote before 30 days had passed, I would have automatically failed review. The lesson here is not to translate the game into too many languages or you may never pass review. Also, you will need to actively court developers from the languages you are localizing into.
You will probably need to go through review more than once:
During review, a French developers pointed out that I had spelling errors in my French description that I would have never let through in English. I recieved similar feedback from German developers. However, since the process was taking so long, and I wanted to make Christmas, I was hesitant to pull it from review. In the end, the extra time in review enabled reviewers to find a problem that I needed to fix, so I had to resubmit the game anyway. When localizing a game however, both the game and your translation are being reviewed. It is quite likely that errors will be found in your translation that you are better off fixing.
A poor translation is worse than no translation at all:
During review two German developers told me that while they could understand my German translation, it was difficulty to read. In fact, they said it was easier for them to play the game in English than it was in German. Ouch!! At the same time a Japanese developer told me that the Japanese translation was better than some XBLA games he has played. The lesson I learned here is that if you cannot afford a professional translator, then make sure that the friends who are doing your translation are translating the game into their primary language.