I should probably mention that on various occasions, Kirby HAS been depicted as being able to talk (as in, in a way humans can understand). For as much as I quite enjoyed his anime series, one of the things I ended up DISLIKING about it was Sakurai's supposed 'edict' that Kirby was apparently not allowed to speak in it (Which is one of the things I feel REALLY hurt that show, as he almost techinally isn't the main character of his own show. What's more, his characterization kind of got affected by that for many years too, considering how in reality, he's a rather deceptively intelligent little guy, if not somewhat impulsive).
Honestly? I feel as if the 'silent protagonist' trope has been played out enough at this point, ESPECIALLY in regards to Nintendo's characters.