He is a Harlem hellfighter from the 15th New York National Guard Regiment fighting within the USA Expeditionary Corps. Not French.
But it makes sense, France did not do anything at all in WW1 right!
It makes as much sense as having a WW2 Eastern Front game without the USSR
I saw a trailer breakdown and all the screenshots, there's no sign of any French made equipment or French troops despite being the biggest innovators during WW1.
There are some Italians wearing Adrian helmets and green uniforms being mowed down by a German Space Marine's handheld HMG (Realism be damned), that's the closest.
Well BFOne is a AAA lowest common denominator FPS, they needs to cater to the anglosphere masses. That means Wunderwaffe, British and US Marines pandering plus throwing some female Arabs and African-Americans to please western SJWs.
Apparently DICE "researched the heck" out of WW1
Here ya go man, LevelCap explains why no French at launch towards the end of the video.
To sum it up for those who don't watch, the developers felt that including France in its own DLC would give them the much warranted recognition for their major involvement during the war. So one whole DLC will focus on the French.