Side note: I'd like to point out one of the very few science fiction novels about linguistics: The Languages of Pao by Jack Vance [1]. The novel is clearly inspired by the Sapir-Whorf concept that language shapes thought [0]. BTW: Another candidate would be 1984. Though not the main these, that novel introduces Newspeak, a language in which dissent cannot be expressed, thus becoming another tool of oppression.

Minor spoiler: In Vance's said novel, the different segments of the population of a planet are taught three separate languages in order to develop and specialize economically, industrially, and militarily.

[0]. https://en.wikipedia.org/wiki/Linguistic_relativity

[1]. https://www.google.com/books/edition/The_Languages_of_Pao/ke...