Then it becomes marketing hype, some people are bored, possibly high on substances, and decide to do something new, or exotic...
So names like vindaloo, balti (bucket) and phall (invented by Bangladeshis in UK) are used.
Balti cooking was sold as Frontier cooking from Baltistan, a tiny state with just 332,000 population, mainly of Tibetan ancestry!
Frontier cooking is from the North - West Frontier Province on the Afghan - Pakistan border, lots of roasted meat dishes, and Biryani, those people are of Central Asian ancestry for the most part.
So the food and so on are quite different from the Balti people, another instance of marketing hype which was started by the UK curry houses in an effort to seem different.
Remember Theda Bara, an anagram of 'Arab Death'?
Of course tongue in cheek names have been there, like Pussy Galore, Octopussy, and so on!
The best way to know about Indian food is to have a friend or acquaintance share their food with you, or teach you.
Recipes are available on line, the TV channel NDTV, and local news paper Times of India have a lot of details.
The regional magazines, others with an Indian audience in mind will be always more authentic than some feature writer in, for example, Australia, who wrote a vindaloo recipe without vinegar.
You then need to filter by availability of ingredients and your own skills in cooking, also what kind of utensils you have.
Try it, enjoy...