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Okay, I figured it out! Turns out I'm quite the idiot! :) I was creating text files in Notepad, but I should have been using the game's editor. They probably use different encodings.
Added 2 minutes ago
It's not possible, it's a certainty.
By the way, I use Notepad, and you need to set the encoding to UTF-8. ;)
Also, is there a script editor? Or are you already aware of its existence?
Here's a link: http://hmm5.sklabs.ru/