They form a subgroup of the international auxiliary languages, but unlike languages like Esperanto and Volapük they are not intended to serve as languages for the whole world, but merely for a limited linguistic or geographic area.
他們形成了國際輔助語下的一個子族群，但不像世界語或沃拉普克語嘗試著不為全世界某些特定的語言設計，區域性人工語言僅用於有限的語言或地理區域。