The tweet title is Formation Girondins. One of his former clubs was Bordeaux who are known as Girondin Bordeaux , so it looks like their fans could have written it, but to confuse matters, his playing record would seem to suggest he left Bordeaux to join PSG and then joined us , so it's not clear who made the song up.
Made by this/these Reds fan(s): https://twitter.com/FourFourTarn/status/891684251862794240 I assume the Bordeaux re-posted it as he used to play for them. Maybe he was a cult hero there too...