This law claims that the national languages must use Cyrillic when being written, but it doesn't prohibit them. National languages are still taught in schools, freely used in conversations and TV programs. Duma passed this bill in response to stupid nationalistic movements which want their national languages to be written by Latin letters. People have been writing their national languages in Cyrillic for decades and now they have to change their skills because somebody consider Latin letters «more convenient» for reading.