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Before 1000 BC

Further information: Bronze Age writing
A very limited number of languages are attested from before the Bronze Age collapse and the rise of alphabetic writing: The Sumerian, Hurrian, Hattic and Elamite language isolates, Afro-Asiatic in the form of the Egyptian and a number of ancient Semitic languages, Indo-European (Anatolian languages, Mycenaean Greek and traces of Indo-Aryan[1][2][3]), and Sino-Tibetan (Old Chinese). There are a number of undeciphered Bronze Age records, like the Linear A (encoding a possible "Minoan language", Proto-Elamite and a "Harappan language" (Indus script).

READ MORE HERE>>>http://en.wikipedia.org/wiki/List_of_languages_by_first_written_accounts#Before_1000_BC

Oldest currently spoken language is Sanskrit  in India, second oldest Coptic in Egypt, oldest currently spoken  European language is Basque.