I've always found it useful to be able to say "I don't speak your language" in the native tongue, currently French, German and Spanish and I'm working on Japanese.
I can say Konnichiwa and count from 1-5, along with basic judo. If I ever need to translate "outer-leg-reap" I'm quids in, not so much with "where is the hotel?"
It’s like much of the rather specialised German I had to learn. If I might channel Bugsy for a moment:
“Entshuldigung Sie bitte, I hab ein panne mit meinem Panzer in ihrem Spagelfeld...”
Not a phrase I get to use every day now