I can see why this is needed. English has very broad words for relatives like "grandfather" or "aunt". Most languages have more specific words, especially Chinese where there are separate words for fathers or mothers side, older or younger and sibling or siblings spouse. You also often use these relation words rather than their names when referring to a relatives. If this code was in Chinese, they would all be short…
Genuinely curious, but is it actually like that in most languages? I wondered if it was maybe an East/West difference, since I haven't come across that in my French & German learning, and I didn't think Dutch or Danish were like that either. But apparently Swedish does have this (eg faster/moster for paternal aunt & maternal aunt)? (Most of my learning is via Duolingo, so I'm no expert, just curious.)
It’s losing them fast though. Newer generations just don’t really care, so the words are falling out of use. I really only know cousin, aunt, uncle.