Sui generis
In sociology, the "sui generis" is what has been externalized, then internalized in the overall public and becomes a part of society that simply exists in its construct. It is not something that is not thought to have been created, because it is imbedded in everyone's way of thinking and being. Instances include the idea of love, or going to school, or clothing belonging to a specific gender. These examples are "sui generis" for they simply exist in society and are widely accepted without thoughts of where they come from or how they were created.
Two-spirit
"Two Spirit" is not interchangeable with "LGBT Native American" or "Gay Indian"; this title differs from most western, mainstream definitions of sexuality and gender identity in that it is not a modern, self-chosen term of personal sexual or gender "identity"; rather, it is a sacred, spiritual and ceremonial role that is recognized and confirmed by the Elders of the Two Spirit's ceremonial community. While some have found the term a useful tool for intertribal organizing, not all Native cultures conceptualize gender or sexuality this way, not all tribes have ceremonial roles for these people, and the tribes who do usually use names in their own languages. While pan-Indian terms are not always appropriate or welcome, the term has generally received more acceptance and use than the term it replaced.