France · Language · Hard
Answer: Langue d'oil / langue d'oc border — The historic linguistic boundary is named after the word for 'yes' in each region: 'oil' in the north (ancestor of modern 'oui') and 'oc' in the south.
The historic linguistic boundary is named after the word for 'yes' in each region: 'oil' in the north (ancestor of modern 'oui') and 'oc' in the south.