I'm really waiting the second release candidate of aMule 2.0 (coz of the crashes and hard disk loading), but I also had a problem at first boot with "locale" detection.
My locales are all set to "fr_FR@euro", but aMule didn't succeed in detecting them correctly and set spanish or brazilian (don't know) instead of french. Maybe the developers should see if that's a bug. Nevertheless I think that aMule should automaticaly set English if it doesn't succeed in detecting the locale instead of a random language.