If you want to use caption as title, so you can have two tiddlers have same title.
You can use TW5 CPL Wiki — TiddlyWiki5 Plugin Library for TiddlyWiki Chinese Communities plugin from CPL, you can switch language to English by click on the button on the left.
See TiddlyWiki-CPL: TiddlyWiki world of Google App Store! for how to use CPL.