When site language or interface language is set as a language that uses LanguageConverter (which adds a variant menu in the dropdown), for example zh, the Edit Button is always shown as "CANCEL".
Example: https://meta.miraheze.org/wiki/Miraheze/zh?useskin=cosmos&uselang=yue, https://meta.miraheze.org/wiki/Miraheze/zh?useskin=cosmos&uselang=zh and https://meta.miraheze.org/wiki/Miraheze/zh?useskin=cosmos&uselang=gan.