pipi room

They know I'm not very good at speaking French. So they give me little bits of English to help.

WC, doobla-veh-seh, is of course familiar. But I had not seen pipi room before.

There's all sorts of linguistic swaps going on. Pipi As the dictionary has it,

pee

1788, "to urinate," euphemistic abbreviation of piss. Noun meaning "act of urination" is attested from 1902. Reduplicated form pee-pee is attested from 1923.

and here's another sign that Sam found for me