Is this a bug?

So i want to put some other language names in my runes and masteries. When i copy and paste. (Using the command c and then command v on the name bar) When i copy and paste then press enter to submit the name it instantly gets deleted and im forced to use an english one. Is this a bug or am i doing something wrong? Also when i do press save it does the same thing. Can somebody tell me how to fix this?
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