Nope, even tho the game is french, the original is English and French is a dub. They even splurged for well known/good english voice actors. But french dub is also good, so you can go for it if you want. Try both for a few minutes and decide which one you want, I guess?
Dota’s had more or less the same map for the past 20 years and it’s been fine. The genre has issues but it’s definitely not the map variety.