Internally, CafeTran Espresso 2019 uses regular expressions completely transparant (invisible for the user) for many tasks. E.g. the selection of all segments that don't contain any letters, is handled via a regular expression (that the user doesn't see/isn't bothered with).
How about taking this to the next level?
My proposal is to allow the user to insert literal strings, that (if instructed so) CafeTran Espresso 2019 internally will translate to regular expressions.
Things, not thinks (need more coffee)