<Tr> <Td> Pritennic </Td> <Td> Common Brittonic </Td> <Td> Goidelic </Td> <Td_colspan="2"> Early Northern Middle English </Td> <Td> </Td> </Tr> <Tr> <Td> Pictish </Td> <Td> Common Brittonic </Td> <Td> Old Irish </Td> <Td> Early Scots </Td> <Td> Southern Middle English </Td> <Td> Norn </Td> </Tr> <Tr> <Td> </Td> <Td> Cumbric </Td> <Td> Middle Irish </Td> <Td> Middle Scots </Td> <Td> Early Modern English </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Gaelic </Td> <Td> Modern Scots </Td> <Td> Scottish English </Td> <Td> </Td> </Tr>

When did english become the official language of scotland