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Postposed topic specification across the Sahara. An areal phenomenon

Abstract In the present study, I argue that post-posed topic specification (PTS) across the Sahara is an areal phenomenon and that in the case of Southern Tamazight (i.e., Tuareg & Zenaga) it is an innovation generated by pattern replication. On the other hand, the required matter for PTS formation in Southern Tamazight is generally provided by Tamazight itself by means of system-internal developments involving the following predominant grammaticalisation track, that is, [*modality markers > topic specifiers]. I also show that full convergence has taken place in these Southern Tamazight languages, which has affected their linguistic typology on the morphological, syntactic, and pragmatic level. Moreover, the study accounts for the significance of the functional parameter of contrast in the development of these topic specifiers and hence confirms the importance of system-based factors in language change.