Definite_article and indefinite_article are available in the object property, but is there something to add, in game_settings() or elsewhere, to activate them?
definite_article and indefinite_article don’t seem to do anything. However, you can now print objects with or without the definite or indefinite article in Beta 66i. See this thread for further details. I’m not sure if this will work for you in French, but give it a try.