Like people who speak a language you don't understand? I've spent a lot of time wondering about that. The dehumanization because of language happens here the state where I live a lot. Things like, "you're in America, speak American" are said a lot, and mostly not as a joke. Though I'm sure that you would be able to communicate at least a little with people who speak languages that you do not.
Not at all. I'm fully capable of recognizing a language I don't understand as an advanced form of communication. Some languages are more advanced than others, but in my book, none will have you demoted from personhood.
Being incapable of communicating in a way I can understand is not the same as not being an advanced enough life form to send more than basic messages. I suppose it can be cooked down to that life form's brain patterns and the like. A person in a coma whos brain can still perform tasks associated with complex thoughts and/or memory is still a person, even if one incapable of communicating with his surroundings. That's a bad example though, as the rules are somewhat different for those who fall ill or are injured in later stages of life.
Ok, time for one of my examples that often seem to offend people, but... that's what I do.
A [healthy, "normal"] dog is not a person, and yet it can communicate about as much to me as a [healthy, "normal"] human baby - perhaps more, given my barriers in understanding Canine. Given that, how is a baby a person? I'll buy that it is
by definition, but I don't understand it.