"Untranslatable Words" by Fucshia MacAree. Prints are available in her shop!
It's fascinating which complex ideas different languages have distilled into single phrases. I think I could spend another lifetime studying linguistics — traveling the world, recording dying-out dialects, exploring how the human mind has created so many distinct pronunciations for the same familiar things.
I recently "Americanized" a book for work and was surprised at how difficult I found it. I thought because of way I'm alert to slang and spellings different from my own, it would be fairly easy — but instead my eyes glided over UK phrases too complacently, as if I were eager to incorporate these puzzle pieces of culture into my own lexicon.
(P.S. A couple more gems.).