First languages of the earth?

No one can know the first spoken language -- there is no way it could have been recorded.

However, the best first known picture writing system of ideographic and/or early mnemonic symbols are:

* Jiahu Script, symbols on tortoise shells in Jiahu, ca. 6600 BC

* Vinča script (Tărtăria tablets), ca. 4500 BC

* Early Indus script, ca. 3500 BC

cuniform wasnt the first language, it was the first writing style, the first writing can be debated as hylogriphics because they represent a story telling knowledge sending.

as for language

History contains a number of anecdotes about people who attempted to discover the origin of language by experiment. The first such tale was told by Herodotus. He relates that Pharaoh Psammetichus (probably Psammetichus I) had two children raised by deaf-mutes in order to see what language they would speak. When the children were brought before him, one of them said something that sounded to the Pharaoh like bekos, the Phrygian word for bread. From this Psammetichus concluded that the first language was Phrygian. King James V of Scotland is said to have tried a similar experiment: his children were supposed to have spoken Hebrew.[citation needed] Both the medieval monarch Frederick II and Akbar, a 16th century Mughal emperor of India, are said to have tried similar experiments; the children involved in these experiments did not speak

I think the first languages of the world, were made up somewhere in Africa because whole civilization and human race was first based on African aboriginals, but the scientist unfortunately ignore that's theory because they are freakin' ignorant geeks.

well i've always heard that the very first language considered by the Proto-Indo European scale was Sanskrit. don't know if that helps you...