I don't think you understand what 'lingua franca' means. No self-respecting people (in Europe/East Asia atleast) give up their languages for a common medium.
India is not exactly on the same stage globally as China or Japan, when it comes to Tech, despite what you claim.
It looks like http://www.aliexpress.com/ has support for more Indian languages than Flipkart. Surely supporting different languages for such a unicorn (which often shows up on HN) can't be that difficult a task ?
See, http://www.flipkart.com/ (only English) vs http://www.rakuten.co.jp/ (English/Japanese) vs http://www.baidu.com/ (Mandarin).
India is not exactly on the same stage globally as China or Japan, when it comes to Tech, despite what you claim.
It looks like http://www.aliexpress.com/ has support for more Indian languages than Flipkart. Surely supporting different languages for such a unicorn (which often shows up on HN) can't be that difficult a task ?