I have uploaded the lang_xx.sql files to var/database/backup/
I have tried to add languages to Administration > Languages > Languages
But somehow it does not get saved in a specific store.
I see that languages are visible in my back end if I select 'All Stores', but not if I select a specific store.
What do I do next to get the languages into specific stores / front end?
OK. Found it. I needed to select 'all stores', then go to Administration > Languages > Languages > edit > Share > Add Stores