Dealing with the theme of Utopia and language is not easy. One would argue that the concept of language control is more suitable to a dystopia than a utopia.
In our study, analysis and production of Eutopia + we have decided that language should be the first topic to be addressed.
I've found an interesting article written by Charlotte Hutchinson, graduate student of English, at the university of Lincoln, which explains how language is an only apparently minor issue in utopian society.
The article is not easy, but it gives an overview of how the theme of language has been dealt with in literary Utopias.
Here's the link to the essay: https://www.academia.edu/2612590/The_Power_of_Language_in_Utopia_Dystopia