I hadn't thought about cats prefering one over the other but I guess it does make sense.

I have probably never thought about it because I am so language deprived that I think I am lucky that I can speak English.

Kristen, have you tried to speak to a cat in english that has not every heard it before? I wonder if the reaction would be differnet then your two that have grown up with both. Just a thought.

Interesting topic though, thanks.