The node above, where you refer to license is a clarifier. But it should have been in the OP, originally. Instead, you originally posted this:

"Does anything restrict me from doing this? What would I need to do to find this out?"

But now the mention of a license raises two other questions:

1. Do you not know that no license is required to use Perl for whatever you wish? and,
2. Is it your desire to write a compiler for an existing language or to write a compiler for a new language of your own devising?

Please, make your questions precise and complete ...
    ...and please, don't update a node (especially one with replies) without a clear note explaining what you changed!