So you wish to hear the story of our people, do you!?
Dunesfolk
A feisty little bunch, with a long history of life in the desert. From an early age, they are made to drink a traditional herbal concoction to raise their resilience to poison, as nearly all the plants and animals in their native lands are venomous. There is what appears to be a thin layer covering the pupil.That too is an evolutionary response to the environment─their bodies' way of protecting the eye from the harsh rays of the sun and errant grains of sand. Unfortunately, it limits detailed ocular research to Dunesfolk cadavers.
Perhaps the most unique characteristic of the Dunesfolk is their native dwellings―structures affixed to the backs of large beasts of burden. It is in this way that they are able to traverse the vast desert expanses of the islands which they call home. The luminous eyes of the Dunesfolk are a result of a glossy, protective layer which covers the pupil, an evolutionary response to the region's glaring sunlight. Many individuals wear a small, traditional gemstone on their forehead, a symbol of their zodiacal sign. They are adamant about scholasticism, placing the advancement of knowledge before all else. Other races tend to perceive male Dunesfolk as introverts who care more for books than the goings-on of the realm, whereas they tend to perceive females as gentle souls with a love for fortune-telling and divination.
In the area of Halatali in Thanalan, there are many ancient lalafellin ruins, some of which are considered sacred and pilgrimage to the caves is common for Dunesfolk.
Plainsfolk
The Plainsfolk are the descendants of the Lalafell tribes who lived on the massive expanses of grasslands covering a stretch of islands far to the south of Limsa Lominsa, across the Sea of Merlthor. While their bodies are small, their ears are markedly large and developed─a trait thought to have been once necessary to locate food, as well as detect enemies in the wide expanse of the steppe.
The flat landscapes of the Plainsfolk's home islands are dotted with the clan's traditional thatched huts, beneath which lie intricate networks of underground passageways. Their distinct hair coloration―a myriad of earthy and grassy tones―helps them to blend in well with their environment, acting as an effective camouflage against would-be attackers. The long, pointy ears of the Plainsfolk are extremely sensitive, said to be able to detect the faintest scampering of the prairie's various fauna. They are a clever and opportunistic people, and crafty with their words. These traits have helped the Plainsfolk excel in the arena of business. The generally accepted view of Plainsfolk males is that they are a cheerful lot, with a weakness for festivals and celebrations, whereas females are seen as a vibrant lot with a penchant for excessive conversation.

Originally Posted by
Neymumu
[Ul'dah] is ours by rights. There ought be a tax, if you ask me. Aye, all non-Lalafells should pay for the privilege of living here─or at least for being so godsdamned tall!
It is also very likely that, much like Ul'dah, its sister city of Sil'dih was also Lalafellin by right. Little is known about the city... however one of its last rulers was named,Lalawefu Sil Tatawefu, the King of Springs, and this is a very lalafellin name.
Speaking of names, you should check out the stickies in this forum for interesting tidbits and naming conventions, if you care enough about lore to name yourself accordingly.
Aaaand I think that's all I know. I think.
BONUS:
A reference to a long-running FFXI joke that tarutaru sacrifices raise drop rates.
I thought the tribes sought crystals to give to their primals. What could we possibly offer them that they don't already have? Short of a Lalafell sacrifice, of course! Ahaha...haha...ha... Th-That was a jest. A jest, I say!