Ability to only import missing website texts

When working with website texts in a project it is really nice that we can create website texts as YAML files to easily generate an excel file and have the texts inside our version control system.

However a problem arises in a real world scenario where a customer goes in and modifies website texts on their own. Which makes importing generated the generated website texts from YAML nearly impossible without breaking anything. Therefore a checkbox to just add missing texts from the excel file would be great. As there is one today to remove missing ones to do the reverse would be a nice contrast.

To take this one step further to make this even more user friendly would be to some sort of view where the user can choose to keep specific translations or overwrite if there are differing values. As then we can more efficiently merge the differing website texts without accidentally replacing texts.