After appearing in two World Cups for Cameroon, the 28-year-old became a free agent and left Schalke 04 this summer.
Stoke emerged as the favourites to sign him over the last week.
Hughes is also confident that they will land the player although he does not want to announce yet until it becomes official.
“He’s a player we’ve got an interest in and it’s one of those we’re hopeful of getting over the line,” Hughes told the Stoke Sentinel.
“You can never say it’s done until it is. I’ve had experiences where clubs have just jumped in at the last moment when you’ve done all the work and they’re able to convince players. We’ll just hang fire until it’s actually official.”