使用言語:(Interface language): You can choose interface language by changing this option. By using this option, you agree all of the following four points: (1) Even after the change in your interface language, the interface texts such as ja.wikipedia.org/wiki/Mediawiki:copyrightwarning that appear to the users with Japanese language interface will remain the valid texts that define important agreements, warning, your expressed intent, and other important issues regarding you and your contributions to Japanese Wikipedia. (2) Texts in other languages are not valid. (3) When changes are made to those Japanese texts, they immediately apply to you as well, even if you are using the interface in other languages. You must check back the Japanese interface texts often to ramain updated. (4) The same explanation is given in Japanese in the above, and in case of conflicts between the two, the Japanese explanation overrides this English one. Please do not use this option if you cannot agree with any of these four points.
