The 23-year-old former Eintracht Frankfurt and Vfb Stuttgart player, who is out of contract, has been on trial at Elland Road and will not cost a fee.
However, he did not receive international clearance in time to face Nottingham Forest tomorrow.
Kevin Blackwell told Leeds' official website: "He brings real quality to the squad at the time when we need it."
In addition to the current deal, The Whites also have an option to keep him for a further year at Elland Road.
He won a gold medal with Cameroon at the 2000 Sydney Olympics.