The language server itself uses a typechecker, so you'd just be building a typechecker that uses another typechecker by a roundabout route.
Though in seriousness I'd presume it would be bad type checker uses language server which uses better type checker, which may help with the problem.
The language server itself uses a typechecker, so you'd just be building a typechecker that uses another typechecker by a roundabout route.