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There are a few missing dictionary keys:

"Batch Upload", "Uploads a number of files to the server.", "Select the Files to Upload Here:", "Unpack ZIP files on the server:", "Make media items versionable:", "Upload as Files", "Uploaded Media Items:", "Filename:"

To resolve the problem you should add missing keys under /sitecore/system/dictionary item in Core database manually.

Read more about adding dictionary keys.