Well, we sort of do. Its not what you'd think however, we don't talk any different than anyone else, but the things we say are just so stupid that no one understand them. We laugh at certain jokes that others don't seem to get. People stare at us like we're crazy when we laugh at "No Thumb Jimmy" (Long story.).
I sometimes talk to people in mashed languages. I'll start in English, but then, in the middle of a sentence, switch to German, and then Russian, Spanish, and then back to English. Sentences look like this: "So, yesterday, Ich ging и пила una película. The movie war действительно malo." They stare at me, and then I realize what I did. I can't speak German, Russian, or Spanish, but I do know a few words in each, and sometimes I accidentally say those words in the other languages.