Aliumpronouns are any pronouns which are not present in a person's spoken language, but have been adapted to be used as such.
This is an umbrella term which encompasses pronouns used in other modern languages, pronouns that used to be in use but are no longer used (aka archaeopronouns), neopronouns, or xenopronouns. An aliumpronoun user may feel inclined to use these pronouns for the aesthetic, because they feel a strong connection to a certain language, because it feels comfortable for them, or for reasons one cannot explain.
The concept of aliumpronouns is very abstract itself- it is essentially taking another language's pronoun and using it in a different spoken language. Because not all languages use the same way of constructing pronouns, an aliumpronoun user will often need to alter their chosen pronouns in order to make sense of it in the their language.
Etymology
The prefix "alium" comes from the Latin word for "other".
History
The term was coined on June 22, 2021, by anonymous FANDOM user.
Flag
The aliumpronouns flag was created by FANDOM user honk4bees, in the style of various other pronoun flags, June 22nd 2021. The flag's colors did not have a specified meaning.
FANDOM user theancientrune suggested meanings for the aliumpronouns flag colors, June 27th, 2021: the dark pink stripe symbolizes the rich history, origins, and stories that archaeopronouns possess, the bright orange stripe symbolizes the great potential that the world's modern pronouns hold, the thin white stripe in the center simultaneously symbolizes both the blank and unknown view us humans have on xenopronouns, and the harmony and peaceful way that each and every pronoun set coexists.