It seems to me the draw of a reptilian world would be to do something different than a typical world - so why make analogues at all? Why make it dwarves/humans/elves in cosplay? Why not keep it a bit more 'alien' and not look for translations, but ask how these creatures might have developed without the warm blooded races, and let those cultures collide.
For my part, I'd add a larger sea component with sahaugin, locathaah, kuo-toa, merrow, etc... controlling the coastlines, and rather than having the plains forests and mountains be the main civilized area, I'd have there be more swampland and have that be the dominant terrain, supported by thick jungle instead of forests.
Also dinosaurs.