Not very much of it. Hardly anybody could read, in any language. About the only people who could were clerics.
In fact, for a very long time in English common law the ability to read was considered proof you were a member of the clergy and able to plead “benefit of clergy” and eligible to have one’s sentence significantly reduced for many crimes.
“In fact, for a very long time in English common law the ability to read was considered proof you were a member of the clergy and able to plead benefit of clergy and eligible to have ones sentence significantly reduced for many crimes.”
(sigh) Because the samples people were given to read in court were always in one of two languages: legal Latin or Anglo-Norman French. No one read those languages without intense educations and no one at all read the latter without studying law. Remember, it was a court room. They used legal readings. After 1066 the language in court proceedings was a version of French. That continued into the 15th century. How many Englishmen could read that? A university graduate from England in the year 1500 commonly could read English, French (the Norman dialect), Latin, and often some Greek.
We still have remnants of that lanuguage in our court system (e.g. voir dire).
French was still the first language of the English kings until Henry IV who died in the early 15th century. His son, Henry V, was the first king to take a coronation oath in English. Famously he was also the first to write in English.