In English you have "someone" and "somebody".

In the alien language of Klingon (which is so alien that is crawling
with terran puns), we have: {vay'} (n) "somebody, something, anybody,
anything".

Now, in this page:
https://www.learnersdictionary.com/qa/difference-between-someone-and-somebody

We read the following:

***** quote start *****
***** quote end *****

One could wonder, whether in the alien language of Klingon (which is
so alien that is crawling with terran puns), the {vay'} has the same
"informal" character as in English.

Wait, you're suggesting that vay' is informal because Okrand mentioned the word somebody in the gloss but not the word someone? That doesn't make any sense on many levels. Here's one: if vay' is informal, what's the formal version?

Okrand wasn't looking for every synonym for somebody when he wrote that gloss. Since somebody and someone are more or less interchangeable, he just included one of them. I have no doubt any data about someone being used more often in formal contexts never even crossed his mind when he wrote it.

-- 
SuStel
http://trimboli.name