Both played for France at four age group levels up to under-19 but under FIFA regulations can change their allegiance as they are dual nationals and have not played a senior competitive international for the team.
New Ivory Coast coach Marc Wilmots met with both Cornet and Fofana this week and the duo are likely to feature in his first squad in June when the team play the Netherlands in a friendly and then open their qualifying campaign for the 2019 African Nations Cup with a home match against Guinea.
In August, they resume their World Cup qualifying campaign away in Gabon. The Ivory Coast head Group C with four points from their first two matches.
(Reporting by Mark Gleeson in Cape Town, editing by Sudipto Ganguly)