Kuvah'magh

Klingon savior figure venerated by a religious minority, believed to be conceived during the holy month of Nay'Poq (VOY: Prophecy)

d'akturak

someone with an "icy" demeanor; especially as a tough negotiator (DS9: Blood Oath)

soh-chim

Klingon legal and social role similar to a "godparent"; bestowed on a family friend who would care for a child if their parents were incapacitated

Gay/lesbian/bisexual/transgender

"loD be' je ngaghbogh loD" (Man who has sex with men and women, i.e. bisexual) and "be' mojpu'bogh loD" (Man who has become a woman)…

K'Ehleyr

ST:TNG character, half-Klingon emissary and ambassador. https://memory-alpha.fandom.com/wiki/K'Ehleyr

Mr./Ms./-san

Some Klingons have names that resemble general nouns ({QaS, Qel}), which may be confusing in some contexts. Titles could be used to disambiguate in some…

Tawi'yan

role analogous to best man at Klingon wedding