Why language is afraid of dialect

Almost all popular languages have dialects, or different interpretations.

Especially on the Java platform, almost all the major dynamic languages are implemented. But these implementations can never be widely used.

Because almost all of the syntax is built into the implementation. There are subtle differences in the implementation of the approximation.

Language implementations may be identical only when the language's syntax becomes a separate, configurable language, as is the case with data structures, where the grammar files are consistent and the language's performance should be the same.

Perl 6 makes this idea a reality.

Perl 6 itself is defined by a grammar file. It's like an XML configuration file. Modify a parameter and the whole syntax changes.

If Python has a separate syntax description file, all implementations are implemented according to this syntax file, then different implementations can be compared. Which implementations are imperfect and which implementations are problematic. This will guarantee the
The cross-implementation properties of the language.

Why language is afraid of dialect