It's an American reporter, writing for an American publication, probably connecting from a US IP address. Why would she expect UK English? And to answer your q

It's an American reporter, writing for an American publication, probably connecting from a US IP address. Why would she expect UK English? And to answer your question, yes, I'd prefer and expect the AI (just like any human) to use colloquial English rather than some pedantic but technically correct vocabulary. If you're in the UK or India and had the same experience, I'd understand your confusion. You should write an article! But if you prefer the pedantic train, "subcontinent" is one word, a common noun, neither hyphenated nor capitalized.