Currently it seems the stackexchange engine only supports english characters in tags - if you, for example, put 一人称 in the tags field it will be ignored. Do we need/want support for such tags?
For info, non-ascii tags have now been enabled on both JLU and meta.JLU. A slight caveat: this code is new, so if there are any issues please let me know directly (a comment here would be fine, just as long as I see it).
If the site community feels this is not helpful, we can turn it back off, but for now: enjoy, but please consider (perhaps a discussion here on meta.JLU is in order) the most appropriate use of such tags.
The tag edit on this question is entirely gratuitous and unnecessary; please feel free to edit it back out...