The Petit Larousse Illustré (PLI) is a monolingual French dictionary which has been published every year since the 1906 edition and which is therefore a fundamental testimony of the evolution of the French language. As a consequence of the pre-1948 editions of the PLI entering the public domain in 2018 the Nénufar (“Nouvelle édition numérique de fac-similés de reference”) project was launched at the Praxiling laboratory in Montpellier with the aim of digitising and make these editions available electronically. The project is still ongoing; various selected editions per decade are going to be fully digitised (so far the 1906, 1924 and 1925 editions have been completed), and changes backtracked and dated per specific year.