Original sentence: By the early 16th century what was then called Inglis had become the language of government, and its speakers started to refer to it as Scottis and to Scottish Gaelic, which had previously been titled Scottis, as Erse (Irish).By the standards of the time it had a 'standardised' orthography and had become the vehicle for an extensive and diverse national literature.By this time Scots had diverged significantly from its sister south of the border
Edited sentence: By the early 16th century what was until then called (or at least often spelled)  Inglis had become the language of government, though its speakers started to refer to it as Scottis and to Scottish Gaelic, which had previously been titled Scottis, as Erse (Irish).By the standards of the time it had an increasingly 'standardised' orthography and had become the vehicle for an extensive and diverse national literature.By this time Scots variants of 'Inglis' had diverged significantly from their sisters south of the border in England.This tendency to divergence would however soon be countered by the Britain-wide publication and dissemination of the King James Bible