This is just me, but I don't see the need for new lizardfolk stats.
Take dragonborn. Make the breath weapon a poison spittle. Give them resistance based on the environment they come from. Change the flavor/description. Boom, you have workable lizardfolk.![]()
Getting back to basics: Half Ogres and Centaurs.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.