Usually fine
- Messages in chat apps.
- Profile bios and about sections.
- Display names, where the service allows more than letters and numbers.
- Posts and comments, though a few places strip unusual characters.
- Documents, slides and notes.
Often rejected or broken
- Usernames and handles, which commonly allow only plain letters, numbers and a few symbols.
- Web addresses and email addresses, which need ordinary characters to work at all.
- Passwords and login names.
- File names, depending on the system.
- Search boxes, which will not match styled letters with ordinary ones.
- Forms that check for plain English letters.
Test before you rely on it
Paste a short test into the field and look at what comes out. If the characters turn into boxes, question marks or plain letters, the place does not support them. Rules change as services update, so a style that worked last year may not today.
For the best result
- Use it for decoration, not for names people need to type.
- Keep an ordinary-letter version for anything people must search for or type.
- Check how it looks on a phone and a computer.