With all due respect, the idea that "several counties in Europe add a space before a full-stop" is bizarre. Which countries? Have you had a look at news media w

With all due respect, the idea that "several counties in Europe add a space before a full-stop" is bizarre. Which countries? Have you had a look at news media website from those countries to check? At the very most it's a mistake more common in European writers that you've worked with, but I can assure you it's not deliberate. Also note that in the examples given the space before the full-stop also means no space after it, which indicates a misplacement rather than an extra space.