Before radio and television, was there a limit to how far a language could spread, geographically, before it would begin to splinter off into separate dialects and eventually new languages? | AskHistorians Archive Observer

Before radio and television, was there a limit to how far a language could spread, geographically, before it would begin to splinter off into separate dialects and eventually new languages?

by TheEmperorsNewHose

Doe22

Not to discourage further discussion, but you may want to try asking this question in /r/asklinguistics as well.