There is a new pull request by gspe against master on the void-packages repository

https://github.com/gspe/void-packages balsa
https://github.com/void-linux/void-packages/pull/27711

balsa: replace enchant with gspell
It compile fine.
I don't use balsa so I haven't tested the spell check but I've tested gedit that use gspell as spell checker and it works fine, so balsa also should works fine.

A patch file from https://github.com/void-linux/void-packages/pull/27711.patch is attached