In one example, a processor may: execute a machine-translation script to generate a machine-translation for a set of strings to be displayed upon execution of a subject application; cause a first display including a listing of testing actions to be performed by a test application; cause a second display that includes a GUI of the subject application, the second display including the set of strings; receive a user-translation for each of the strings via the GUI; and update the machine-translation script to include the received user-translations.