CJK characters are a set of characters shared across Chinese, Japanese, Korean, and other writing systems. The tag cjk_character should only be used when a specific language cannot be discerned.

In most cases cjk_character and a language tag are mutually exclusive; however, if there is an isolated CJK character (such as on a shirt, sign, or tattoo) as well as a definite language present (such as dialogue or other large text inclusions) then both tags would be appropriate