Languages is not available for subscription via the Kindle, but then,
it doesn't really need to be. You can subscribe to it for free and have
it delivered to your mailbox.
All it is is one
sentence a day, translated into English and... whatever language you've
chosen. I've chosen Spanish and German (I get two separate emails.) The
sentence is the same in both languages, so I"m learning both languages
simultaneously, which is fun.
It's a lot easier to
learn to read a language than it is to speak it. If you just want to be
able to read books in the original, check out Bitesized Languages as a