"Corrupted" was perhaps the wrong term to use because of that report category (which I was aware of and haven't needed to use so far). It was clear this user was misguidedly trying to help: as I said, this is an common error made by many native Dutch speakers.
Like ufm correctly pointed out, the problem is that these types of newly introduced errors now go completely unnoticed, since the string is no longer considered changed. The only way to rectify this was rechecking all of the game's translations again.
None of this would be an issue if the check were switched to double spaces. In other languages, adding incorrect single spaces to steal the translation will still immediately stand out, except maybe at the end. Comparing with a simple trim operation could mitigate that.
Like ufm correctly pointed out, the problem is that these types of newly introduced errors now go completely unnoticed, since the string is no longer considered changed. The only way to rectify this was rechecking all of the game's translations again.
None of this would be an issue if the check were switched to double spaces. In other languages, adding incorrect single spaces to steal the translation will still immediately stand out, except maybe at the end. Comparing with a simple trim operation could mitigate that.