You and Thou

So I did some follow-up research regarding my question in class Thursday about Latin pronouns. Nowhere on the Web, from university websites all the way to Wikipedia, did I find any mention of a formal/informal distinction between the Latin second-person pronouns.
On a closer look, I found this: Crystal mentions on 307 that the development [...]

The Ultimate GVS site

There is a tendency to be cowed by the Great Vowel Shift. I know I am. This website developed by Melinda Menzer of Furman University explains it all. We’ll have a close look in class on Tues 25 March.

More on Chaucer (ca. 1390) and Lollards (1400s) and the emergence of SE

We ran a bit short of time on 28 February, so I wanted to make a couple of quick points about comparing late ME/Early EMod (or EEMod?).

1. I hope no one thinks I’m trying to promote Wycliffite/Lollard religious ideas. We’re just interested in the language.
B. Please hang on to the translations you produced in class, [...]