Sui generis
In local government, a "sui generis" entity is one that does not fit with the general scheme of local governance of a country. For example in England, the City of London and the Isles of Scilly are the two "sui generis" localities, as their forms of local government are both (for historical or geographical reasons) very different from those of elsewhere in the country. 
In a press conference during which reporters were trying to analyse his political personality, Huey Long said, "...say that I am "sui generus", and let it go at that."
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.