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Should proto-Greek really be included? It's not a period but a Proto-language, and an unattested one at that. 126.96.36.199 (talk) 19:37, 20 July 2015 (UTC) For example, Proto-Germanic isn't included in the history of the German language. 188.8.131.52 (talk) 19:39, 20 July 2015 (UTC)