hands down, THE best way to learn a language is to live in a country where they speak that language for at least 3 months. it's the fastest and most effective (ie, you don't forget it as easily as book learning)
my feedback is that if you want to target a high-end market you need a high-end website of your own.
The design of the current site + cart solution doesn't reflect the elegance I assume your main clientele would be accustomed to.
I'm a huge fan of Shopify for simple, pretty online stores.. you might want to check it out.. many of their free themes would be an improvement over the current design.