What are the Dwadashangi and why are they significant in Jainism?

Read the following excerpt and answer the question that follows:

"The Sutta Pitaka centres particularly on the basic principles of Buddhist thought and practise. And it, therefore, is the foundation for the study of Buddhist doctrine throughout the Theravada Buddhist world."

(Source: https://www.wisdom/ib.org/buddhism/essay/phi/osophy-of-/anguage-in-the-five-nikayas/d/doc1148277.htm/)

What is the focus of the Sutta Pitaka, and how does it contribute to Buddhist teachings?

What does the term "Sakya Muni" mean?

Which language was the Vedic literature written in, and why did it create a problem?