For printing presses we're talking about the influence of the first printing presses hundreds of years before industrialization which were imported from Germany and even when they started making their own in England they were more like clones and used imported designs and parts. The early machines had a heavy influence on the written language particularly at times when under 1 in 10 people could write, and with the advent of movable type the people who learned to write were heavily influenced by what they read... books printed on German-design machines. You really only need one generation in a situation like that to dramatically change the language. Losing þ, æ, and ð