Some characters are unsupported by the "Play" button font

In the beta Lanucher, the Play button on the main screen does not support some glyphs for the text written on it. It makes it aesthetically bad-looking. 

 

The following languages are affected: Vietnamese, Tamil, Hebrew, Upside-down English, Tatar, Kazakh, Hindi. However, there's a possibility that new non-Latin languages will be added in the future and they'll require adding new characters as well.

The bug has reappeared recently, see https://bugs.mojang.com/browse/MCL-21552 for more info.