This tool allows you to check which files in your translation need updates. To show the list choose a directory (it doesn't work recursively) or translator.
When you click on the filename you will see the plaintext diff showing changes between revisions, so you will know what has changed in the English version and which information you need to update.You can also click on [diff] to show the colored diff.
Choose a directory:
Or choose a translator:
Good, it seems that all files are up to date for these conditions.