French Fries aren’t French. They’re Belgian, also named Frites, frieten, patat, chips.
Where to eat Belgian fries in Chiang Mai? Go to Nomads Restopub, a Belgian pub.
During World War I (1914-1918) American soldiers were fighting in Belgium. They were introduced to fries, of course. At that time the official language of the Belgian army was French, hency they nicknamed the fried potatoes “French fries”. But now you know better: they're Belgian fries.