The FPS in the viewport is displayed in a string of the form "fps: %.2f". The string that stores it is of length 16, which is plenty enough in English. But the translated message in Hindi uses Devanagari, which takes up 4 bytes per char. Because of this, it is too long and there is not enough room for the numbers to actually appear. To solve this, the containing string length was doubled to 32 chars. Pull Request: https://projects.blender.org/blender/blender/pulls/109408