If it's done right and doesn't sound awkward, than it's tight. If it sounds awkward though, it makes it sound corny as fuck. It's really hit and miss though...
And for God's sake, if people are gonna use Spanish words, at least be able to pronounce that shit correctly! I've heard some Darkroom shit in Spanish that is fuckin ridiculous. And I like some DR shit, but some of those fools CANNOT talk in Spanish but still try to rap it...