for translation of your sentetece  i think mathew give you the right answer but if we want to do better then translation of words we can say "y 'a t'il quelqu'un qui parle le français?"its like we say "is there any one who can speak freanch" so its ssems like "does anybody speak english "

merci beaucoup

Someone/somebody: quelqu'un

Anyone in certain cases: n'importe qui.

I'm not sure, but I think that when anybody/somebody are interchangeable you should also use quelqu'un.

Cheers!

so "anybody" "sombody" "Anyone" and "someone" are all "quelqu'un"

Quelqu'un parle français?

Je crois que c'est ça. :)