<Tr> <Td> 1917 </Td> <Td> Quenya </Td> <Td> </Td> <Td> created by J.R.R. Tolkien </Td> </Tr> <Tr> <Td> 1928 </Td> <Td> Novial </Td> <Td> </Td> <Td> created by Otto Jespersen </Td> </Tr> <Tr> <Td> 1935 </Td> <Td> Sona </Td> <Td> Sona, an auxiliary neutral language </Td> <Td> created by Kenneth Searight </Td> </Tr> <Tr> <Td> 1943 </Td> <Td> Interglossa </Td> <Td> Later became Glosa </Td> <Td> created by Lancelot Hogben </Td> </Tr>

Which language was the first spoken language on earth