“Can You Score A 20/28 By Matching The Idiom With Its Real Definition?”: Prove It

I'm pretty sure it is. In German, it's "Da ist etwas faul im Staate Dänemark", so I'd bet it's just the same in any language that does Shakespear

No, I never heard any of these.

I've heard the Spanish ones, as I was adopted into a Hispanic family at birth and grew up bilingual (Spanish/English.) The rest, no. I guessed at the rest (with fair success.)

Yes, many. Also, the porridge-one is similar to the German "Talk around the hot pap" with the same meaning. And the tomato-on-the-eyes is used regularly, although maybe not as much as it used to? Dunno that many really young people so I can't say for sure

I can confirm the Italian one about the wedding and the French (and Italian) about the scalded cat. Also some of the others sound familiar in concept if not in the exact words.

I can confirm the porridge in Slovakian language. Also, when we give up, we don't screw it, we cough on it.

The Hungarian ones are completely correct and often used.

Yup. I speak French and German and I grew up using «I only understand the train station» (German) and «Having a spider on the ceiling.» and «A scalded cat fears cold water.» (French). In French we also have something similar to «Walking around hot porridge.», we typically say «Circling around the cooking pot.» Those are expressions I still use daily. They only sound weird because they are translated into English, so it doesn’t make any sense.:)