Sarapen

[They] are prevented by diversity of language from conveying their sentiments to one another, so that a man would more readily converse with his dog than with a foreigner.  But the Imperial City has endeavored to impose upon subject nations not only her yoke, but her language, as a bond of peace . . . but how many great wars, how much slaughter and bloodshed have provided this unity?

St. Augustine, The City of God (c. 413 AD)