> The GPL already makes it so you cannot translate to another programming language to circumvent the license

The operative words are the last four there. GPL, and all other software licenses (copyleft or not), can only bind you as strongly as the underlying copyright law. They are providing a copyright license that grants the licensee favorable terms, but it's still fundamentally the same framework. Anything which is fair use under copyright is also going to be fair use under the GPL (and LLMs are probably transformative enough to be fair use, though that remains to be seen.)