lenga experimental gismu

x1 is a speakable language used by persons x2

A narrower term than bangu, is limited to speakable, usable in dialogues languages used by persons (lo prenu). Doesn't include languages with information transferred one-way (languages of road signs), doesn't include computer programming languages that are not speakable between two persons.

In notes:

x1 is a sprachbund, a group of languages x2 that have common features resulting from geographical proximity or language contact