Providing for accurate translation of elements in a web application is accomplished through systems and methods of efficiently debugging translations for error-free localization. In an exemplary approach, a source language file and a translated language file of string properties and other elements of a UI are compared, and visual coding of string properties and the other elements is generated in a user interface panel. The visual coding distinguishes among characteristics relating to translation states. Edits to the string properties can be displayed as they are made, and an ad hoc changes list produced by the edits can be exported.