Tera language

Tera is a Chadic dialect cluster spoken in north-eastern Nigeria in the north and eastern parts of Gombe State and Borno State. Blench (2006) believes Pidlimdi (Hinna) dialect is a separate language.
Varieties.
Blench lists these language varieties as part of the Tera language cluster.
Origin of Tera (Nyimalti).
It was acclaimed that Nyimalti tribe migrated from Yemen in Arabian Peninsula together with other tribes like the Babur, Jukun, Bokewa, Jara, Margi, Tangale, Tula, Waja, Kanuri, Kanakuru, and Kare-Kare around 8th century AD. They sojourned through the route of lake Chad basin down to Buma on the Hawul river that joined the Gongola River valley. They moved northward and left some of their kiths and kins at Kanakuru, Dali, Gol, Kukal, Gasi, Kwata Tera, Wuyo, Balbiya, Ngazargamu and Shani to settle in Shinga. While some settled on the way during the long journey, some proceeded in search for greener pasture for their livestock, farm land and possibly a habitable place to practice their cultural heritage.
From Shinga, it was gathered that some Nyimalti groups dispersed along several routes; some moved Eastward to Wade, some Northward to establish Bage, Gwani, Difa, Kinafa, Difa, Lubo and Kwali, some Westward to establish Liji, Kwadon, Kurba and southward to found Deba, Jagali, Zambuk, Panda and Pata. 
Phonology.
Vowel length contrasts are neutralized in monosyllabic words with no coda consonants.
All vowels but and are more open in closed syllables such as in ('to plait') and ('to cook soup'). and tend to be fronted to when following palatalized consonants.
Diphthongs, which have the same length as long vowels, consist of a non-high vowel and a high vowel:
Tone.
Tera is a tonal language, distinguishing high, mid and low tone. Tone is not indicated orthographically since no minimal trios exist; minimal pairs can be distinguished by context.
Orthography.
The first publication in Tera was "Labar Mbarkandu nu Yohanna Bula Ki", a translation of the Gospel of John, which established an orthographic system. In 2004, this orthographic system was revised.