@Curator Underscores ( _ ) also work to separate words, but ONLY underscores. Anything but underscores, letters, and numbers will cut the hashtag off at the first non-usable symbol: #this_will_work, but #this-will-not (it will show up under #this).
@noelle :O who knew
也是一只自由泳的小鸟
@unagi @Curator ah, good to know! I hadn't looked at the code or run into middle dot (\u00B7, ·) in use. Zero-width non-joiner (ZWNJ / \u200C, a non-printing character used to join two ligatured characters together) is accepted as well.