Thank you for your feedback !
Yes at first i implemented runes and symbols but i realized really late that browser didn't accept them unless if i apply a font but my components weren't scalable at that point and so i had choosen the cyrillic alphabet because browser accept them by default.
With all the feedback i see what i thought was clear for me is definitly not the case for this game and i'll learn from it to improve my next games, thank you very much for taking the time to play and feedback !