Some of these make a lot of sense, not just as a Gen Z thing, but overall adopting them shouldn't annoy anyone. I will continue ending my sentences with a full stop but maybe I'll start picking more expressive emojis than :)
For example - https://sv.wikipedia.org/wiki/Sahara
Sahara (arabiska: الصحراء الكبرى, aṣ-ṣaḥrā' al-kubra, "Den största öknen")
You'll note the öknen there and if it was capitalized you'd have Öknen.