Step 1: Identify Bernier's nationality:
Francois Bernier (1620-1688) was a French physician and traveller.
Step 2: State his stay in India:
He lived in India for about 12 years (approximately 1656-1668), during the reigns of Shah Jahan and Aurangzeb, and wrote 'Travels in the Mogul Empire' describing Mughal court and society.
Final Answer:
\[ \boxed{\text{France; lived in India for about 12 years (1656-1668)}} \]