It's really hard to recommend anything without knowing more. I would definitely find him a Speech Therapist to work with. And if he hasn't had one, he will need a swallow study to rule out any food or liquid going down the wrong way into his lungs. The tongue plays a huge role in speech and swallowing and paralysis would greatly impact those areas.

@@CrackingtheCodeforCaregivers thank you for your reply 🙏