You can use a-z, 0-9 and underscores.
Used by Sticker Importing Apps: https://core.telegram.org/import-stickers
37
You can use a-z, 0-9 and underscores.
37/37
Fair Dog,
Jun 18, 2021 at 06:07
You can use a-z, 0-–z, 0–9 and underscores.
37/37
Classy Beaver,
Jun 29, 2021 at 10:37