Thanks for playing.
The letter changes are intentional and represent the first puzzle of the game.
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Yes. As the game name "Iliterate" suggests there are portions of the game where you can't read.
This puzzle is inspired by the situation where your friends secretly change the language of your cell phone (and the deep dream fear of suddenly unlearning common skills)
This might not be a good design or a good puzzle. Im still learning to do that. But it is intended.