Assuming that Frances lose World War One, how the country looks like after?

Let's say that after is 10, 20 and 30 years after.

No meme content like Stalininst France or a french nazi like ideology.

The peace treaty is very conservative, let's say that to regain their colonies lost to the british the germans decide to only take Madagaskar from France, and annex the city of Nancy on their land.

The PoD is the USA not joining the war and France collapses on the spring offensive in 1918 with the effects of the Nivelle offensive riot still ringing on their country.

What about the French politics? The economy? The army?