Background of the issue:
I'm trying to find a way to be notified via WordPress action whenever translation content is being changed in some way. Specifically, I would want to be notified about translation changes in a strings package, but notification actions for other types of changes would also be useful.
Symptoms:
There doesn't seem to be anything like this in WPML documentation.
Questions:
Could you please point me to the action name for my case if there is any?
If there are not, is it possible for you to consider adding such functionality in future versions?
Meaning that no action is documented in the WPML API for what you described. The action you mentioned is internal, so you can try using it, but I cannot guarantee that it will meet your needs or if it works at all.