Hey Vasanth,
4.8 is still in preview and I don’t recommend updating to that version until it’s closer to it’s stable release. In versions before 4.8 the localization dashboard doesn’t exist, but you can go through the same process using the command line setup explained in the documentation I’ve linked. Your choice you can wait for 4.8 or dive into the command line setup.
As for BP only way of accessing the current culture… I don’t believe there is an option. I’ll add a ticket to get it exposed to blueprints. I’m unsure if this will make it into the 4.8 release though.