The number of speakers of Occitan in France has gone, in the past 100 years, down from 1 million to about 100k, and their language enjoys no form of official recognition or protection.
The number of speakers of Tibetan language has gone, in the past 100 years, up from 1 million to about 6 million. Tibetan is the official language in the Tibetan Autonomous Republic in China, and all Yuan banknotes have their worth written in Tibetan as well as Chinese.
Tibet was sold to China in the 20th century. Natives in America were conquered and uprooted centuries ago, and more than once.
If you want a more apt comparison:
The number of speakers of Occitan in France has gone, in the past 100 years, down from 1 million to about 100k, and their language enjoys no form of official recognition or protection.
The number of speakers of Tibetan language has gone, in the past 100 years, up from 1 million to about 6 million. Tibetan is the official language in the Tibetan Autonomous Republic in China, and all Yuan banknotes have their worth written in Tibetan as well as Chinese.