Translation Statistics
In the top-right corner of the Manage Translations page, you'll see statistics for all collections, strings, languages, and translations in your account.
Company Languages shows how many company languages are set up for your company.
Custom STrings is the total number of strings in all of your company's collections. For information about creating strings, see Adding Strings to Translation Collections.
Completed Translations shows the percentage of all strings in all languages in your company's collections. When you click the See Missing link, you're take to the Strings subtab of the Manage Translations page with the filter set to Missing Translations.