Frog Folk in 5e

Frox or Bufokin (a bit of a misnomer, as frox resemble frogs more than their warty, dry-skinned cousins) are amphibious humanoids native to the bottomlands and marshes of the country of Yanth. Following rivers, they've ranged beyond their ancestral home to be a common sight in river towns. Their call and response work songs can be heard dockside all over Azurth. Frox work as bargemen or stevedores in civilized areas, and as hunters, farmers, or guides in their villages.

Frox legends say they come from a land across the Boundless Sea, which they left to escape persecution by a terrible and poisonous race of toad-folk, but this claim is considered doubtful by the scholars of Azurth for many reasons--not the least of which being that the Boundless Sea has no other side!

Frox are generally shorter than humans and tend to be thinner of limb, though many develop a potbelly as they age. Their skin colors are generally a dull green or brown, though they range from muted reds to purplish-gray.

A wealthy Frox businessman and tribal chieftain visiting the palace

Frox Traits
Ability Score Increase. Dexterity increased by 2 and another ability score by 1.
Age. Frox live shorter lifespans than humans on average with only a few living beyond their mid-60s. They are mature by their early teens.
Alignment. Frox tend toward good but are have no special affinity for Law and Chaos.
Size. Frox are between 3 and 4 feet tall. Small.
Speed. Base walking speed in 25 feet.
Jumper. Frox can long jump their full Strength score in feet from standing start, and double their Strength in feet with at least 10 feet of movement in a running start. They can high jump a total of 6 feet (rather than the usual 3) + their Strength modifier in a moving high jump and  half that for a standing jump. They have an advantage on Dexterity (Acrobatics) checks to land in difficult terrain.
Swimmer. Frox can swim at their full movement rate and rough waters only cost them 1 extra foot for each foot of movement. They use double their Constitution modifier for the purposes of holding their breath.
Resistance to Poisons. Frox have an advantage on saving throws against poison and resistance against poison damage.
Moisture Dependent. Frox require twice as much water as most races. However, submerging most of their body in water for 20 minutes or more reduces their requirement to standard levels.
Languages. Frox can speak and read (limited) Common. They also speak their on croaking, chirping tongue, which has no written form.

[Thanks to Evan Elkins, the creator of the Froglings, the basis for the Frox.]

A frox traditional dwelling