I have answered it, they aren't dumb as what you think. Very often enough there are English phrases in their cartoons more than you think is just pure Japanese language.
I have just watched Gurren Laggan, and there are words like "Giga Drill!" "definite kill".
Gundam : "Commencing sequence initiation." "critical damage" "hyper drive"
Hence, this is trivial.
This is almost like you think they won't know what is "Transform!" "To all are one" "destroy decepticons"