User blog:Goji73/"Alien" or "Seijin"

Lately, I've been going around and seeing a mix-up in names for the aliens of the series. Some of the articles go by the name of seijin (ex. "Baltan Seijin") and some go by the name of alien (ex. "Alien Guts".) Could someone please figure out what the aliens are supposed to be refered to as so that way we don't have to constantly divide article on the same subject?

Personally, I think they should all be refered to by the prefix "Alien" (Alien... whatever) since the term "seijin" is more akin to the japanese name and is already in the name already. The real translation should begin with Alien instead of seijin since that's how the translation would make it start off as.