Hello,
I just submitted the new strings for Moodle Mobile version 2.6 that will be released this Friday.
There are 5 new strings related to the new functionality of downloading all the course contents with a single click.
You can find the strings to be translated in the component: local_moodlemobileapp version 2.6 (you only need to translate the strings for that version, no need to copy the strings in following ones).
Thanks, Juan