[gjm11]

Well ... https://puzzling.stackexchange.com/questions/94326/a-cryptic...

(Someone made a cryptic crossword[1] whose clues and solutions were in the Bahasa Indonesia language, and it was solved by a couple of people who don't speak that language at all.)

[1] These are mostly a UK thing; the crosswords in US newspapers are generally of a different type. In a cryptic crossword, each word is given a clue that typically consists of a definition and some wordplay; there are a whole lot of conventions governing the wordplay. So e.g. the clue "Chooses to smash pots (4)" would lead to the answer OPTS; "chooses" is the definition, "smash pots" is the wordplay, wherein "smash" indicates that what follows should be anagrammed (smashed up).

Disclaimer #1: it took those people a lot more work than it would have taken them to solve an English-language cryptic crossword of similar difficulty, and they needed a bunch of external resources.

(Dis)claimer #2: one of those people was me.

Disclaimer #3: I do not claim that something needs to be able to do this sort of thing in order to be called intelligent. Plenty of intelligent people (including plenty of people more intelligent than me) would also be unable to do it.