Due to procrastination and other reasons, I have a number of article translations that seem to have been unmodified and unpublished for more than 1 year. There seems to have been quietly cleared, there is not even logs to remind. Some of them are completed but not satisfied, due to lack of peers and/or self-confidence. Any way to find the cleanup log? Even the content? (I know this is difficult) And, I suggest that you provide a notification or email notification to the translators to save something that might be useful. p.s. considering rights and privacy, I don't recommend automatic posting to a draft at present.
In addition, it seems that users only need to open, automatically save, and close the translate page to renew a translation. This does not seem to be a good measure for real waste, consider a quota such as the number of translating (this also prevents others to translating).