Related tidbit: the Spanish generally use the generic "carne" to mean red meat from cows. But there is also a specific word, "biztec", which is a corruption of the English "beefsteak".
You meant "bistec", which means a thin cut of beef. I don't know how international that word is, though --it is used in Mexico, but I don't where else. In Argentina they have another word derived from the English word "beef": "bife", which I think means steak. I also don't know how international "bife" is, in Mexico it definitely only occurs in Argentinian restaurants.
Bistec is commonly used in Spain, too. And Bife is used in European Portuguese - not sure about Brazil.
In French (at least in Canada), "roast beef" is "rosbif", with almost the same pronunciation :)
In Metropolitan France, rosbif is a term of endearment (or contempt - depending on how you take it!) for a Brit.
Tabernac! (I'm English Canadian btw)
As far as I know Spain (from 2 years of living in that country) it's not really like that: "carne" means just "meat" and "red meat from cows" is "ternera". And "bistec" is what omaranto said.