NerveControl said:
You don't need to write "char:" before the tag. All tags are marked as general tag by default when created.
On wikis, this syntax doesn't work. In the tag box, prefixing it with char: will create the tag as a character tag. Same goes with copyright and copy:. This is if you want to quickly create the tag in the correct category without going through the long-winded method of using the edit dropdown against the tag (and you shouldn't). Then to create the wiki you just press the question mark beside the tag in the post page and press "create wiki" which will create a wiki for that tag with the name being autofilled.