While in France its best to stick with mcdonalds...HOWEVER...there is halal food available near Montparnasse..Montparnasse is a tall building in France and is pretty central..so you can easily drive there...just next to it there are a lot of roads with halal food...most of them are iranian/arabic places..
we tried them last time and were pleased otherwise it gets too much to just eat fish and chips always!!
Macdonalds Fish o fillet all the way.. lol and btw strawberry shake is haram
dont think theres any halal food in there; no harm in asking once you get there
/\ because its ingredients contain animal fat. found the like on google but couldnt acess it coz of slow internet. if u can plz do; share it with rest aswell. onc site eben claimed that chips wernt halal aswell.. Allah knows best