Every variety of a language is a dialect; what OP means is that there is no governing body determining what constitutes "standard" English, like the Académie fr

Every variety of a language is a dialect; what OP means is that there is no governing body determining what constitutes "standard" English, like the Académie française. Rather, there is an informal standard used by the media and elites in every English-speaking country, making it a pluricentric language[0]. [0]https://en.m.wikipedia.org/wiki/Pluricentric_language https://en.m.wikipedia.org/wiki/Pluricentric_language