After the war, he cut back on his political activities to concentrate on literature. At the beginning of the 1950s he started to compile "rondalles", a type of folk narrative, which where published as Rondalles valencianes (1950-1958). During the 1960s he returned to underground political activities involving Valencian nationalism and, as a result, he became a political prisoner of Francisco Franco's dictatorship from 1966 to 1968. Once out of prison he founded almost the first magazine in Valencian in the postwar period; Gorg ("Whirl", in Valencian). When Franco's dictatorship ended, Enric Valor was be able to spread freely his opinions and literary works. He became honoured with many important literary and linguistic awards from all over the Països Catalans. During the 1990s there was a move among some Valencian cultural groups to propose Valor as a candidate for the Nobel Prize in Literature, but it didn't come to fruit.
Valor then died in 2000.
His first linguistic work was in the weekly magazine El Tio Cuc based in Alicante. He was contributing to the development of the Catalan-Valencian-Balearic Dictionary (such a Catalan inter-dialectal dictionary) under the directorship of Francesc de Borja Moll, which included a Southern Valencian lexicon. Like Carles Salvador and Sanchis Guarner, he was one of the principal promoters of the standardisation of Valencian by means of works such as Curs de la llengua valenciana (Gorg, 1961), Millorem el llenguatge (1971), and Curso medio de gramática catalana referida especialmente al País Valenciano (1973).
In 1983 he released La flexió verbal where he summarized the widely dialectised Valencian verbs. This work became the principal reference for the normative use of verbs, and is used as essential teaching material for Valencian pupils.
His most known work is Rondalles valencianes (1950-1958), where 36 valencian popular tales are collected as a literary narration. Other works with a similar style are Narracions de la Foia de Castalla (1953), and Meravelles i picardies (1964-1970).
Valor was also a writer. His first novel was L'ambició d'Aleix which was started between the 1940s and 1950s, but it was being re-written until its release in 1960. Perhaps his most important novel work is Cicle de Cassana which is made up of three novels: Sense la terra promesa (1960), Temps de batuda (1983), and Enllà de l'horitzó (1991). The Cicle de Cassana trilogy aims for the regaining of collective memory between 1916 and 1939. In 1982 he published La idea de l'emigrant.