Hello,
I do not see the Loco translate plugin on your site. Do you use Poedit to create translation? Update translation files of Core plugin, then find and translate mentioned strings.
1/ Backup your translations files
2/ Open your translation files by using Poedit software
3/ Go to Menu > Catalog > Update from the pot file section and click
4/ Choose xstore-core.pot file and save
5/ Poedit will keep your existing translations and migrate translation file with the new system
6/ Now you can see new translation words on your file
Regards