Could actually have Tada settlements within Fens as well as other lake/watery areas.

The Tada evolved from toads, and have maintained their amphibious abilities to a certain extent.  They have a naturally high resistance to poisons and other toxins, but due to their amphibious nature are more susceptible to fire based damage than the other races.  The Tada are the most magically attuned of all the W2 races.

Visually they vary greatly, I imagine a Boss Nass (starwars) type look, perhaps verging towards warhammer Slaan.  Definitely not Mr Toad from wind in the willows…  Most will have the ability to change colour between two or three patterns and colourings, thus many have ‘war glamour’

An ancient Inca feel would go well, but could be a bit too stereotypical – the Mocha tribe worshipped Toads as a hallowed creature.

Culture wise, they are sophisticated by comparison, and have perfected the art of water manipulation.  Most structures float on natural and Tada made lakes, but are anchored to prevent catastrophe in bad weather.