Hey Sparky,
Once you are done with the translation don't forget to
save and sync the po | mo file.
Refer:
http://prntscr.com/ly75hz
Tip: to avoid highlighted notice please make sure you copy translated file into global language folder from loco translate. then string will be secured even if you do update.
For profile dashboard you could change it from
wp-admin > lms > setting > logged in menu.
delete previous items and add new ones then you will be able to edit their label. dont forget to save the changes. this will do the trick.
Refer:
http://prntscr.com/ly74x0
Good luck.