Does the library have any audio material like Berlitz or Rosetta Stone for learning a foreign language ?

The library does not collect audio material for language instruction. You might check with your local public library which is likely to have audio material. Current DePaul students may call or visit the Department of Modern Language's Tutoring and Language Center. The website Open Culture provides free podcasts of foreign language lessons. Language learning apps, too, such as Duolingo have become a convenient and popular way to acquire and improve foreign language skills and vocabulary.