Barton would love to sign permanently for l'OM.
"I had a twelve game suspension in England," he said. "I was lucky because I could play in the Europa League. I'm progressing slowly. I still need to play games. It is by playing games that improves fitness.
"It is important to train but I need to play in the Europa League and L1. More I play, the more I'm stronger physically. I'm really excited.
"My career started well at Marseille but I came here to succeed, to show the fans what the spirit of English football is all about."