it's not a computer-related speech story, but being that you're a french/english bilingualist, you'll probably get a kick out of this.
My other half is french, and I am american, so we tend to speak both languages rather frequently, and sometimes even manage to mix in words from both languages in the same sentence. So one day, we're talking about making some carrot/tomato salad vinagrette stuff, and he comes out into the living room and asks me:
"would you mind raping some carrots?"
it was the best language mistake yet (although that's pretty much the only one he's made, and I've done quite a few on the french side).