The short contract is thought to be in place due to the 27-year-old's long going injury problems.
Talking of his latest capture, Pearson said: 'We are delighted to have added Yann to the football club. I now look forward to him having a positive impact on the squad over the coming months.'
The signing of another striker means City now have five strikers all fighting for first team football. Although competition is healthy, fears over Matty Fryatt's possible Premiership departure are sure to be ongoing amongst the Foxes faithful.