Here is what the NY Post says:
Bergdahl’s parents, who had lobbied continuously for his *release, had not seen him by Saturday night, but intimated that he faces an arduous recovery from his ordeal.
Bergdahl is speaking in what appears to be Pashto, said his dad, Bob Bergdahl. It was not clear whether his son can still even speak English, Bob said.
When the father spoke to his son — for the first time in five worried years — it was to say both in Pashto and English, “I am your father, Bowe.” The bizarre tale of America’s last known POW | New York Post