The Malagasy language belongs to the Greater Barito East group of the Austronesian family, the language most closely connected to Malagasy dialects is Maanyan (Kalimantan), but Malay as well other Indonesian and Philippine languages are also related. The African contribution is very high in the Malagasy genetic make-up (about 50%) but negligible in the language. Because of the linguistic link, it is widely accepted that the island was settled by Indonesian sailors after a maritime trek but date and place of landing are still debated. The 50% Indonesian genetic contribution to present Malagasy points in a different direction then Maanyan for the Asian ancestry, therefore, the ethnic composition of the Austronesian settlers is also still debated. In this talk I mainly review the joint research of Filippo Petroni, Dima Volchenkov, Soren Wichmann and myself which tries to shed new light on these problems. The key point is the application of a new quantitative methodology which is able to find out the kinship relations among languages (or dialects). New techniques are also introduced in order to extract the maximum information from these relations concerning time and space patterns.
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