When are less syllables or words MORE formal / LESS casual? Eg Goodbye: じゃあね vs just じゃあ


[That Japanese Man Yuta seems to say](https://www.youtube.com/watch?v=kN-
fQBIZhz8&t=297s) じゃあね (jaa ne) is actually LESS formal / MORE casual compared
to じゃあ.

[![enter image description
here](https://i.stack.imgur.com/GL0iC.png)](https://i.stack.imgur.com/GL0iC.png)

  1. Btw, is the n supposed to be in red too?

  2. What's up with that MORE syllables are actually LESS formal / MORE casual? What are other examples of this?

cf [Is お needed before 誕生日おめでとう (Happy
birthday)?](https://japanese.stackexchange.com/questions/29034/is-%e3%81%8a-needed-
before-%e8%aa%95%e7%94%9f%e6%97%a5%e3%81%8a%e3%82%81%e3%81%a7%e3%81%a8%e3%81%86-happy-
birthday)

お誕生日おめでとう is more polite / more formal / less casual compared to 誕生日おめでとう
right?




I'll focus on -ね here. I would say it makes the utterance more intimate rather
than more casual. Similarly to じゃあね vs じゃあ, おめでとうね sounds more intimate than
おめでとう.

Politeness can sometimes be explained with high vs low status but it can also
be explained with distance. Here, it's more about distance. Presenting
yourself too close to a colleague can be inappropriate (which appear to be the
context in the video).

