To manage translated pages we've created a special option. You can check it by clicking the language button above the pages. By default, it will display the original language of the store.
Click on it and choose the desired language. Pages, translated into this language, will appear. Here you will see info about the separate pages. For example, their status: translated, partial (partly translated), not translated. Manage them according to your needs.
Also, if you have many pages, it's a very comfortable feature to search for the translated pages by their names. In the search field enter the name of the page (or some keyword) you want to find in the selected language. Choose the item you want to manage and make your changes.