Zo lived collectively in the place known as Ciimnuai, for a long period of time until they experienced population explosion. Finding new settlements then became essential for their survival for cultivation, in the hope of getting sufficient food from fertile soil for each community. Consequently, they scattered throughout the mountains, dales and valleys within and surrounding the present Chin State. Due to communication difficulties and their isolation, each departed group from Ciimnuai developed a unique dialect. The Sizang language emerged the same way as Vaiphei, Teizang, Saizang, Val, Zou, Dim, Khuangsai, Hangmi/Milhiem and others, and are closely related to one another.