You could have followed the footnote to the number of speakers in the wikipedia rticle...

_«De fait, le nombre des locuteurs de l'occitan a pu être estimé par l'INED dans un premier temps à 526 000 personnes, puis à 789 000,» ("In fact, the number of occitan speakers was estimated by the French Demographics Institute at 526,000 people, then 789,000") Philippe Martel, "Qui parle occitan ?" in Langues et cité n°10, décembre 2007.

How that turns into 2 million speakers in the article infobox is a mystery to me...

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