Exipronouns, archpronouns, paleopronouns or trad pronouns is a term to refer to the “standard” naturally/traditionally existing pronoun sets of a language. They are the opposite of neopronouns. In English exipronouns are he/him, she/her, and they/them, as well as it/its (though some people may consider "it" be a neopronoun, since it's not standard usage when referring to a person).
The term exipronoun was coined by Tumblr user Anicrossic on June 30, 2020, and trad pronoun on the same post was coined by trans-kayn. The term paleopronoun was coined by the Tumblr user lgbtqiarchive in August 16th, 2019, and the term archeopronoun was coined by Tumblr user carbonated-neon on August 15th, 2019.
The flag was created on July 2, 2020 by a Tumblr user who wishes to remain anonymous. The stripes each represent a different pronoun set: blue represents he/him, purple represents she/her, green represents it/its, and yellow represents they/them. Orange represents people who use a combination of these pronouns.