(CNN) - With their son finally free after nearly five years in captivity, the parents of Sgt. Bowe Bergdahl say his fight is far from over.
They say he's having trouble speaking English; a defense official says the reason for that isn't clear, given the trauma Bowe Bergdahl's has been through.
One thing hasn't changed for his parents: They can still only address their son through press conferences.
"I love you, Bowe. I'm so very proud of you," said Jani Bergdahl, the sergeant's mother.
"We're talking like this because we haven't talked to Bowe yet," said Bob Bergdahl, Bowe Bergdahl's father. "There's a reason for that, and that's because Bowe has been gone so long that it's going to be very difficult to come back."
Bowe Bergdahl's father says that journey has only just started.
His condition after almost five years in captivity isn't clear, but he appeared in diminished health when he was last seen in a video obtained by the U.S. military in January.
In exchange for his return, the U.S. released from Guantanamo Bay five Taliban members. That deal has raised questions with members of Congress.
"There is deep concern about these individuals, who are the top, hardest of the hard liners, being released and having the opportunity to reenter the fight and endanger the lives of additional men and women who are serving in the military," said. Sen. John McCain, R – AZ.
"I think that obviously everyone should be happy that our soldier is out of harm's way," said Sen. Jim Webb, D - VA. "But I think some very good points have been made about the exercise of presidential authority."
While yellow balloons and ribbons mark the homecoming of a prisoner of war, Bowe Bergdahl's father stresses that his son's recovery and reintegration will be a long process.
Once the soldier receives treatment in Germany, it's believed that he will be transferred to Brooke Army Medical Center in San Antonio.
It's not clear whether his parents will see him for the first time in Europe or in Texas.
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