Does Marxism allow free speech

Answer 1

Whilst I don't believe my answer is a complete answer it is perhaps a semantic one:

"Marxism" is a political theory developed at the end of the 19th Century by Marx and Engels. It's policies are laid out in the original "Manifesto of the Communist Party" published by Karl Marx and NOT to be confused with the Constitution of the former Soviet Union.

Marx expected his Proletarian Revolution to begin in capitalist developing countries with a large intellectual class and educated workers. The very last place in Europe he expected to see adoption of his economic and political policies was Tzarist Russia, which had virtually no middle class and no education for peasants and workers.

Karl Marx's work makes no mention of restriction of free speech.

Answer 2

Marxism does not view free speech as an absolute right, believing that speech should serve the collective good of the working class. In a Marxist state, censorship may be used to suppress ideas deemed counter-revolutionary or harmful to the socialist cause.