16th Century
Spelling and punctuation before the 16th century was highly erratic, but the introduction of printing in 1470 provoked the need for uniformity.
Several Renaissance humanists (working with publishers) proposed reforms in French orthography, the most famous being Jacques Peletier du Mans who developed a phonemic-based spelling system and introduced new typographic signs (1550). Peletier continued to use his system in all his published works, but his reform was not followed.
Read more about this topic: Reforms Of French Orthography