French Fries didn't actually come from France nor did the French actually invent the French Fries.
But instead the reason why French Fries are called French Fries is because French Fries got their name from American soldiers who were stationed in Belgium.
The American soldiers stationed in Belgium were first introduced to French Fries during World War I and the American Soldiers nicknamed the French Fries as French Fries because French was the official language of the Belgian.
The name stuck for years and it's the reason why we still call fries French Fries in America and in many other countries.
So they were not made specifically by the French but that's the reason we call fries French Fries.