I see. Still, this is quite common. For instance the English Wikipedia article [0] use the "random French capitalized article" ("Though the proportions are more modest, _Les_ Olympiades are designed similarly to the esplanade of _La_ Défense.", emphasis mine) but not the French Wikipedia 0article [1], which uses "normal" (to me) grammatical articles.
[0] https://en.wikipedia.org/wiki/Les_Olympiades
[1] https://fr.wikipedia.org/wiki/Olympiades_(quartier_parisien)