In english, the variables foo and bar are very often used for simple examples, or for anonymous variables (see these three posts for more on these metasyntactic variables (1), (2), (3))
Usually, I often use titi, toto and huhu and it seems that I am not the only french guy to use them.
So, they should be different in german, spanish, chineese or whatever language...
And you, depending on your mother tongue, which variable names do you use (other than bar and foo, of course) in that case (I mean for anonymous variables, since we all know that we shouldn't use them in real program) ?