> each statement in any existing language is about replacing language.

I found that difficult to parse. Moreover, it's a strong claim. Can you provide some evidence as to why it's true? I can find some trivial counter-examples. For instance, which part of "I like oranges." evolves English as a language?

Language as a self-refuting system, doesn't evolve, or evolve us, it devolves towards increasing arbitariness, the faster it's used, particularly once automated.

“We refute (based on empirical evidence) claims that humans use linguistic representations to think.” Ev Fedorenko Language Lab MIT 2024

.at some point a direct contact must occur between knowledge and reality. If we succeed in freeing ourselves from all these interpretations – if we above all succeed in removing the veil of words, which conceals the true essence of things, then at one stroke we shall find ourselves face to face with the original perceptions.. Ernst Cassirer The Philosophy of Symbolic Forms