Yeah, didn't really love the fandom vernacular that has always felt foreign in-universe. I saw in the title page credits a thanks to Nicole Spiegel at Disney. She was the credited representative at 20th Century Fox for almost all of the Dark Horse Aliens comics for the past couple decades, and I always attributed a lot of the consistency and in-universe editorials to her. Rightfully so or not, I would've thought the "facehugger" term would've been caught by the studio consultants.
"Egg layer" didn't really bother me, not hard to believe a random character would be using that term, especially considering one has laid an egg in him....