Ngog has been approached by Cameroon manager Paul le Guen, who worked with the player as a teenager at Paris St Germain.
But such a move would mean Ngog, 20, would be missing from Premier League action for most of January, when the African tournament is being held in Angola.
He admitted: "I have had contact with the Cameroonian federation. Now I need some time to think about things. I'm very flattered."
Le Guen, short of strike partners for Samuel Eto'o, has promised Ngog a World Cup finals place.
Ngog, who has played for France from Under-16 level through to Under-21, qualifies through his Cameroonian father and can make the switch thanks to a FIFA rule change.