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In page North Sumatra:

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Mostly ethnic Chinese in North Sumatra are fluent in Hokkien with Zhangzhou dialect mixed with Malay/Bataknese/Indonesian words, while for Chinese around Labuhan Batu area using Quanzhou dialect that has similarity with Bagansiapiapi Hokkien. The small Teochew and Hainanese speakers are also exist. The ethnic Indian people in Medan speak Tamil with a some Punjabi speakers among Punjabis. The Acehnese people speak Aceh and Gayo language.