Well, maybe I used a bad example.

In Polish (my language) there are words that shouldn't be left at the an of the line. Such as "z" in a sentence "Dzięki nim korzystanie z Internetu staje się naturalne ..."

In this sentence - if I have to break the line, it should not be done between "z" and the next word. But at the same time, it shouldn't be trated as a character that has to be very close to the next word, like it would be desired in "5 kg" or "12 PM"

I hope I've written it in understandable way, I'm not too good with my wroten/spoken english anymore. (havent used it for a while )

Plus, it's 5 AM here