Provided you have the right materials, such as books and audio tapes, you can learn the rudiments anywhere. It would be advantageous to attend an institute that teaches it formally.
Sioux
You can learn about the Sioux Indians at your local library. Libraries will have a lot of books that will tell about the lives of the Sioux Indians.
Most Brazilians, like most other people, don't go anywhere to learn their native language. They learn it at home as infants and young children.
There are many listed words in the Sioux language dictionary but no translation for the name Pam.
Hindi is a language. It is difficult for non-Hindi speakers to learn anywhere.
osage
Yes, but I don't think you can learn it anywhere.
This lexicon of Siouan words is intended to be an aid to learning the language of the Lakota Sioux.
whichawonka
Halopasa
Wanbli luja
hablakasj;a