That's correct. On both of these sites, I may use C, C++, C#, Java, Python, PHP, Ruby, or Perl. On Interviewstreet I may also use Haskell. On Codility I may also use Javascript, Pascal, or VB.NET. "The language of your choice" would probably include Algol-68, Lua, more than zero Lisps, D, and Brainfuck.

and on Coderloop you can also use Fortran, Erlang, Objective-C, Lua, Javascript, Scala, OCaml, Clojure and Common-Lisp :)

http://www.coderloop.com/home/guidelines