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What is the rule for characters permitted in usernames?

  • Please, what is the rule regarding characters in usernames?

    Strict Latin alpha? Alphanumeric? Accented characters? Etc.

    Which punctuation is allowed? Underscore(_)? Period(.)? hyphen(-)? Etc.

    I am trying to understand the rule, for programming, and for user documentation. (Experimenting by creating many usernames to discover the exceptions, would not be a reliable way to discover the rule, in my opinion.)

    Thanks!

  • The topic ‘What is the rule for characters permitted in usernames?’ is closed to new replies.
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