Fun fact: Russian translation of Dancing men is legitimately solvable, with messages being _in Russian_!
The translators had to butcher the characters' names and twist the deduction logic here and there — but it's still a marvel of localization work (especially given the languages, grammar and even alphabets being very different).
Can it be found online? If not, can you provide the translator’s name?
The Artemis Fowl books did this too, though somewhat later.