Low FPS when changing language

Is this during the language change, or an aftereffect? If it's during, then the answer is that the game has a TON of text to translate. If it's after, it COULD be the game not being used to the new language. That's just a theory, however. I don't pretend to understand complex Java.

When the language is English it works normally at 120FPS. After changing to other language, the fps goes about 13FPS(In the gameplay)

Please attach the complete output of the "Development console" which can be found on the second tab of the launcher.

If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

I found the problem was from "mcpatcher" when i changed the language without mc patcher it worked fine.