Alien vs. Predator: Rated PG-13 because ET-on-ET violence is OK. Had it been human on human, or ET on human, it woulda been an R. But as long as it bleeds green, it’s OK to kill it.
Alien Resurrection: Rated R for horrendous writing. Oh yeah, there’s some swearing too.
Lost in Translation: Rated R for excessive boredom and inanity which should not be subjected to those under the age of 17. Those older than 17 should have better sources of boredom than spending money to be subjected to it.