If I were time travelling backwards through England, how far back could I go before not being able to communicate with locals anymore?

by eastcoasttaco
Andynot

I've seen this question come up before. You could probably search the FAQ to find it

Edit: [here] (http://www.reddit.com/r/AskHistorians/wiki/language#wiki_how_far_back_could_i_go_and_still_communicate.3F) is a link to some similar threads