What does Cortana do?
Cortana retrieves and processes information. So instead of wasting time searching the Internet for the currency of Brazil or shipping regulations in Russia, users can simply ask Cortana a question and she'll [not sure how Cortana is a female] comb the Internet to find the best answer. Cortana can also make web browsing easier: Now featured within the Edge browser, Cortana can quickly make sense of any unfamiliar words or concepts with a simple click.Think of Cortana as a new personal assistant. You'll have to test it out yourself to see how global "she" is. Meanwhile, have a look at "Businesses Try to Fix Machine Translation." And we still love Eriksen Translations for real people doing real translations (small plug).
Note: The above on Cortana is an advertorial on Mashable.
Learn more: How Cortana solves the issue of 'lost in translation' for small business owners