The 20-year-old has been called up to the Three Lions squad for their game against Sweden in Stockholm on Wednesday, but since it is a friendly he can choose to play for his country of birth, the Ivory Coast, later in the future.
"It's 50-50 because I was born in Ivory Coast but all I know is England," he told The Guardian. "When the time comes, I'll make a choice.
"For now, I just want to reach the top. I'm not saying I want to leave Palace but the Premier League's where I want to get to eventually."
Palace are currently at the top of the Championship table with 33 points from 16 matches.