Slovenian uses the formal one for adults you are not personally connected to. So like strangers or people in positions that demand somw respect. Definitely used for people like teachers, professors, your SO’s parents…

There is also a half formal way of addressing people that I kinda hate and is also completely grammatically incorrect and I don’t really know how to explain the way it works. It can only be used in past and future tense (because the present does not have a modifier for the verb). So the first part of the verb is taken from the formal (plural) form of the verb and the second part is taken from the informal (singular) form.