Lanti was a critic of Stalinism and the theoretician of a new doctrine, anationalism, which aimed to eliminate the very concept of the nation as a guiding idea of social organisation.

Following the war, he returned to Paris, became acquainted with Lucian Banmer and Ludoviko Glodeau, and he reaffirmed his support for Esperanto with his editorship of Liberiga Stelo.

It has been suggested that Orwell included elements of Esperanto in the "Newspeak" language he created in his anti-totalitarian novel, Nineteen Eighty-Four.

In 1935 Lanti founded the independent magazine Herezulo in which he criticised the Soviet regime more forcefully than in Sennaciulo.

After his retirement in 1937, to meet Esperantists, Lanti left France for good and travelled to Spain, Portugal, North Africa, Japan, Australia, New Zealand and South America.