In Ken Follett's novel, "Fall of Giants", which takes place in the same time period as Downton Abbey, a welsh girl tells her mother that she is pregnant by saying, "I've fallen for a baby." Later, she says, "I fell for a baby." (Same woman, different baby.) It's a good novel, with good characters. Lots of personal stories, and very in depth into why WWI was fought.
Sayings are interesting. In England they say that someone "went to hospital", the way in America people say "went to jail" or "went to school". This phrase probably didn't take in America, because there weren't enough hospitals in early America for it to be used frequently.
One thing I heard that was funny is that a lot of early American language was filled with phrases read in Shakespearean plays. These were either archaic stuff, like calling Autumn "the Fall", or stuff Shakespeare made up, like referring to a "deck" of cards.
Old expressions are interesting.