Honestly it's grim but the social power of the group that uses it. If you speak a prestige dialect your patterns are "rules" and if you don't your patterns are

Honestly it's grim but the social power of the group that uses it. If you speak a prestige dialect your patterns are "rules" and if you don't your patterns are "errors." But in both cases it has nothing to do with the language per se, just social and political relationships.