A lot of languages increase accessibility. Aside from a lot of working class folks not speaking English as a primary language (or not at all), there are also other accessibility languages like ASL. These aren't just valuable for accessibility though. There's still a lot of cutting edge anarchist theory in all types of languages that isn't available in English. And how many surveillance tools do you think are scanning social media for ASL?
Authoritarian structures collapse in the face of the kind of complexity that we want to exist.
Multilingualism is a prefigurative praxis.