The Matlopogiogân (Proto-Matlapogiogân for of inner land) languages are a subdivision of the Ydtobogȧntiaky Languages spoken in Southern Amalan. Some features of these languages that make them distinctive from other Ydtobogȧntiaky languages is the change from tripartite alignment to ergative-absolutive, the merging of the dative and ablative, and the monophthongization of most diphthongs.
Matlapogiogân languages originated in 6700BK slightly northeast of the Ydtobogȧn Peninsula. Its speakers created Ydtobogȧndeki, which in its later stages became used for all Ydtobogȧn languages.
Due to migration of its speakers from the Ydtobogȧn Peninsula to areas occupied by Gigxkpoyan speakers, most Matlapogiogân languages change due to Gigxkpoyan influence.
The ancestor of Matlapogiogân languages is thought to be Proto-Matlapogiogân, which was spoken from 6500BK to 4000BK. Sound changes from Proto-Ydtobogȧntiaky resulted in a relatively large amount of front vowels (five out of eight total), the omission or change of most fricatives, the palatalization of some sounds, and the loss of length distinction in vowels.
Unlike its predecessor, it has six grammatical cases. The first-person plural inclusive pronoun *uȧk disappeared, and its exclusive counterpart, *deuk, began to be used for both meanings. Verbs also developed a suffix indicating a verb (-i, rarely -ê) out of the suffix used to mark a transitive verb(-y), and markers of transitivity ceased to be used.