Board Thread:Support Requests - Getting Started/@comment-33125403-20190831223011/@comment-9605025-20190831225302

Wikia prevents users from creating accounts with usernames that are already taken. I believe the reason for this should be obvious. In addition, Wikia also prevents users from creating accounts using usernames that are "too similar" to usernames that are already taken. I don't know the exact algorthm they use but the reason is that usernames that differ by only 1 or 2 characters could be easily mistaken for each other. The message your friend got regarding "Alexander46" is pretty clear; someone is already using that name. Regarding "Alexandr46", I would guess (but don't know for sure) that your friend is triggering the "too similar" condition.