Speech disabilites for PhD admission for international applicants

One of my Iranian friends wants to apply for a PhD program in computer science to a US university. He can't speak fluently even in our native language at all, but in the other side he has a relatively strong background:

• Good GPA in both MSc. and BSc. (> 18 out of 20)


• First rank in BSc.


• Graduated from most prominent university in Iran (Sharif Univ. of Tech.)

Question: is there any chance for his application to be approved and for him to get funded?

Note that my question is a little general. I'm not considering a particular university. What I am looking for is how much is it possible for a PhD student to not participate in presentations, lectures, team works, typically all works in which he should speak.

In the other hand, I've listed below what he can do perfectly.

• Teacher assistant for lower level students (designing exams, assignments, marking exams/quizzes papers, but not presenting at classroom)


• Review scholarly articles/papers


• Generally all regular jobs that a normal PhD student can do (excluding speech presentations and such assignments)