The Graduate Program in Applied Linguistics accepts both Brazilian and foreign students, regardless of their nationality. 

Foreign candidates to the Master's and Doctorate’s Programs must follow the regular admission process. The invitation for application is posted on an annual basis at the Admission Process website. Such invitation is written in Brazilian Portuguese since mastering this language is a requirement for the program admission.

Foreign students already enrolled in the Graduate Program courses in their own countries may be accepted as special students in the subjects offered by the Program, provided that they are properly authorized by the responsible professor. 

In order to prepare for your trip and learn about the University's enrollment procedures, applicants both to the Master's and the Doctorate's  programs must carefully read the Academic Board instructions at
http://www.dac.unicamp.br/portal/pos/estudante_estrangeiro [1] 

The University also offers, in some of the cases, Portuguese courses for foreigners. You can find information about enrollment in these courses at:
http://www.cel.unicamp.br/ [2]