SWEDISH WORD OF THE WEEK: WEEK #29
SPRÅKGRODA (common gender/en-word, pl: språkgrodor)
1. when you are talking and you make a really embarrassing linguistic mistake, usually when speaking a foreign language
In Finnish there is an idiom "letting a frog come out of your mouth" about saying something embarrassingly stupid, linguistic or otherwise :)
It's even more common to shorten it and just say "groda" (literally just "frog"). The verb/expression is "göra en groda". To illustrate: Kungen gjorde en groda när han tilltalade Arbogaborna som "kära Örebroare."