Valid characters for usernames?

While it’s clear usernames are not limited to ASCII-only, I do not wish to spend 2024Q2 stuck with Mojibake if I, for example, rename myself with an emoji with a ZWJ sequence in the middle. Is it best to change to the desired username and then report my profile with a request to change it back if it got garbled? Is there some non-binding place I can test that shares character validation rules as a username?

@PUBLIQclopAccountant
It does my heart so good to see you use the term ‘Mojibake’.

Thank you. Thank you so much.

As your possible reward, please PM me the name you’d like to try and I’ll try changing your profile’s name to it.

May I jump in here tangentially to say, please don’t?

In the past I’ve already gone an installed extra languages, emoji and fallback fonts in an attempt to get all the ✨✨quirky symbols✨✨ people use in names to display, and still haven’t succeeded at fixing them all. For example, the last symbol in your selection just displays as a missing-character-square for me.

Just a little

right now.