content: That's a really interesting accent, it's not exactly Indian. I had to google where he grew up. Anyways Indian accents are one of the hardest to understand. AFAIK Cortana (and Siri/Google's nameless thing) have always had a hard time with that accent. It's really not surprising it failed, it's more surprising that the CEO of microsoft wouldn't have tested out what phrases are easy for Cortana and stuck with those.