Hello,
I noticed that some lines are missing from the values-fr/strings.xml file.
Is there an easy way to add what's missing from values/strings.xml so I can translate them ?
If not, I'll make copy-paste.

Yes, please go ahead and copy/paste lines from values/strings.xml into values-fr/strings.xml as needed. They should be easy to find because they are all commented TODO (as a reminder that I still need to copy them into the translations).

Also, I should probably mention that all the help_ related strings were moved recently. That's now found in values/help_content.xml (and values-fr/help_content.xml).

Ok, I'll have a look on this too.