It's Old English "about English Language".
Bede's Story of Caedmon here, is a translation from latin into a West Saxon dialect of Old English.
"swetnisse ond inbryrdnisse geglængde ond in
Engliscgereorde wel geworht"
http://137.122.151.29/ENG3316B/story_of_caedmon.htm
This is an easier side by side translation
http://www.heorot.dk/bede-caedmon.html
I don't know that this was used in everyday speech by commoners, as most were illiterate. maybe SA knows, I'm going to make some coffee and look it up. Good way to start my day.