Template:Unicode is deprecated. This template is non-functional, but is kept because it was widely used in the past, and deleting it could render old versions of articles unreadable.
This template should always be substituted (i.e., use {{subst:Unicode}}). Any accidental transclusions will be automatically substituted by a bot.
See also
{{IPA}} – To format symbols of the International Phonetic Alphabet
{{PUA}} – To mark characters from the Private Use Area that should be retained