as a girl, heres my best advice
im telling you from the beginning, dont get your hopes up about the eye contact lol
if she finds you cute then good, but dont go into this with the mentality she likes you or should act a specific way
try approaching her to talk, you can start of with whatever interests yall have in common
as a girl, im telling you, do NOT make the fact you like her cosplaying or whatever the main focus, more like, if you wanna talok about that/praise her, the focus should be in what she does, not in you liking it
do not ask her for a fucking pic, i know yall chuds
the language is your biggest problem desu (if we omit the 4chan poster thing), but as long as you tell her about it first and got basic knowledge it should be okay, may even come off as cute

tldr
>approach her, do NOT speak as if she owes you something
>"hey! sorry for my (language), its not my first language, but ive seen some of your cosplays and think theyre awesome+youre very cute, would you like to go get something to drink sometime? no preassure"
>if not interested "cool! dont worry about it" and go your way
>if yes, have a couple topics prepared to either extend the conversation for a bit there without it being awkward to present yourself as someone interesting from the first interaction
>if yes but shes seemingly busy/ in a hurry/ with her friends dont try to make conversation right there, exchange numbers or whatever and go on with your day
>nigga do NOT mention youre a 4chan poster

>>34295545
>Should I bother asking her out if I ... can't speak her language

Exactly how were you planning to do that?

>>34295799
use my limited skills, maybe she gives me a break.