you're asking for my opinion it's National Protection.
The Mughal Empire spoke only Chagatai Turkic initially, but also used Persian (official/court language) and Urdu.
19.2 How did Empress Suiko and Prince Shotoku come to power? -when their uji family became powerful enough to loosely control all of Japan (example= Prince Shotoku was regent under Empress Suiko.) ... 19.6 Describe Japan's language before it was influenced by countries on the mainland.