The 30-year-old signed for the Loftus Road club in 2011 under Neil Warnock, but after earning a 12-match suspension on the final day of the 2011-12 season, he subsequently left on loan to Ligue 1.
Barton says he is happy in France and wants to stay - despite there being more financially attractive offers to move back to the Premier League.
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"We'll talk with Vincent [Labrune, president]. I have a two-year contract with QPR which complicates everything. Otherwise, I would not even be asking the question.
"I also have more financially attractive offers in the Premier League, but I'd rather stay here. Money is not a problem. At QPR I get £70,000 per week, here it's between £100,000 and £130,000 per month.
"But all I know is that Marseille supported me when no-one else did, and that is worth more than money.
"I think QPR will let me go. The say the opposite, obviously, but there will not be compensation. There is a clause in the contract I signed that says if Marseille wnat to keep me, they will not have to pay a transfer fee. QPR deny this clause exists.
"I [would] find it hard to return to QPR. They dropped me when I had my suspension. It would be like going back to a girl who cheated on you. How can I wear the QPR shirt?
"The Premier League is very different. In England, you play against the best players in the world every week. In France, no disrespect, I do not know most of the players I play against."