You know the kind of girls that are just like super either like secluded or don't show shit or whatever.

I know a lot of Portuguese and Brazilian girls around me that do this. I send them a request in PORTUGUESE(because I am fluent but not Portuguese) and just say "hey it was nice meeting you last night at that party" or something like that in perfect Portuguese. I think something like that will be enough for them to at least reply and be like i think you got the wrong person BUT why do you know Portuguese...or something like that. I am think it's gold to use on these Brazilian girls(they creme for an American dude who's good a Portuguese), I am testing it out tonight. But how would it work/be altered around American girls or other foreign girls?