mmmmm...delicious cheese coney...
What is the language dependence? Is there some word/language puzzles, or is there text only for the explanations?
At least one member in your group will need to be English language fluent. Each phase has story elements that need to be read, in English. Also there is at least one clue that requires reading in English. I don't recall anything that would require any cultural context knowledge of the the U.S. to solve.