[danans]

> This is how you spell achar in Persian, اچار. Find me a dictionary that has an entry for this word.

Here you go:

https://dsal.uchicago.edu/cgi-bin/app/steingass_query.py?qs=...

[19f191ty]

Well there you go, so it seems there were records of the word's usage around 1820s. Nice job. I can tell you one thing though. In colloquial Persian, achar for pickle is not used. It sounds odd and usually signifies some relation with Indian style pickles