English has a compact kinship vocabulary. Many other languages are more specific, and some are less. Comparing them shows that the question "how are we related?" is partly a question about what a language chooses to notice.
Names that say which side
English "grandmother" does not say whose mother. Swedish does: mormor is your mother's mother, and farmor your father's mother. In the same way morbror is your mother's brother and farbror your father's brother. Where English says "uncle" and "aunt", these languages carry the family side in the word.
Names that say older or younger
Mandarin Chinese distinguishes your father's older brother (伯伯), his younger brother (叔叔), your father's sister (姑姑), your mother's brother (舅舅) and your mother's sister (姨). Cousins have their own words depending on side and relative age.
Names that say less
In the Hawaiian pattern, described by anthropologists, relatives of a generation share one word: all cousins are called brothers and sisters. The tradition lines up with a family where cousins are raised close as siblings. Many English speakers do the same in speech, calling a first cousin "my cousin brother".
What Kinage does
Kinage is English only for now, using the standard genealogical terms. The two numbers a and b it computes do not depend on language, so they can drive another vocabulary later. For the English naming rules in full, start with cousin degree and removal and the terms list.