All wikis have the "Emoji" tag, which marks edits if an emoji was added to the page.
The problem is that this tag is currently not localizable: I.e, it is always shown as "Emoji", regardless of the user interface language.
It is possible to define the tag's name using [[MediaWiki:Tag-emoji]]. However, it should be done for each project manually.
A better way to localize this tag name is adding it to [[Special:AllMessages]] and making it translatable on Translatewiki.net. In this way, the tag name will be displayed in accordance with the interface language, instead of always being displayed in English. This is the same as [[MediaWiki:Tag-visualeditor]], [[MediaWiki:Tag-mobile_edit]], etc..
Another message that should be localizable is [[MediaWiki:Tag-emoji-description]]. This is the description of the emoji tag, as shown on [[Special:Tags]]. Currently, this tag contains no description at all. I suggest to add a description for this tag, and to make this description localizable.
Thanks in advance.