We've just started using the Language Key and Text Finder.
The FIND function is great; however, we've noticed that whenever we click the item to insert it into a blank entry (after having clicked the ADD ROWS button) that this overrides ALL of the Text entries on the page.
I've tested on several sites and get the same results.
And I had one client do that and not notice that it replaced all the text entries and then saved it wiping out a bunch of translations with the bad file.
We were able to recover from a back-up, but I think we definitely have a bug here:
CB: Version: 2.1.0+2016.12.18.16.28.40.cb77dc626
J!: 3.6.5
PHP: 7.0.13