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I say we follow the [established rules on SE:](https://codegolf.meta.stackexchange.com/a/14339)

> Rather than dealing with inconsistent schemes for adding flags, let's just consider each separate invocation of a compiler/interpreter/whatever a separate implementation (and thus a separate language by our rules).

E.g. Scala `-language:postfixOps` counts as a different language from vanilla Scala, and we don't care about counting how many bytes the flags are.