This this way, for public record you have to write down everything that is said. (In an English-speaking place) Everyone can say anything they want. But if a large section of people say things in chinese now the recorders are writing paragraphs of phonetic translations with english characters. This creates a strain on everyone trying to read the record and creates an attack vector where people embed very offensive things in chinese phonetics that when said in english most people wouldn't like to say or read. Narrowing the rules of "You can only speak english but say ANYTHING you want" is not a censorship of idea conveyance (the point of language). The point of a protocol is its purpose. The purpose of bitcoin is to transfer units from one set of addresses to another. Creating outputs that go nowhere, creating unspendable outputs, embedding superfluous data in an input, and creating anchorpoints on outputs that hold massive data stores are all outside this purpose. Saying no one can define spam or it's a meaningless distinction are using somekind of post-modernist "nothing means anything" anti-logic.