Case in point: Steam has recently clarified their policies of using such Ai generated material that draws on essentially billions of both copyrighted and non copyrighted text and images.
To publish a game on Steam that uses AI gen content, you now have to verify that you as a developer are legally authorized to use all training material for the AI model for commercial purposes.
This also applies to code and code snippets generated by AI tools that function similarly, such as CoPilot.
So yeah, sorry, either gotta use MIT liscensed open source code or write your own, and you gotta do your own art.
I imagine this would also prevent you from using AI generated voice lines where you trained the model on basically anyone who did not explicitly consent to this as well, but voice gen software that doesnt use the 'train the model on human speakers' approach would probably be fine assuming you have the relevant legal rights to use such software commercially.
Not 100% sure this is Steam's policy on voice gen stuff, they focused mainly on art dialogue and code in their latest policy update, but the logic seems to work out to this conclusion.