Here’s an interesting story from the BBC about a BBC Journalist, Sonia Mathur, who is asking for help about why Welsh is similar to Hindi.
This was sent to me (along with the comment of “perhaps this explains why you like curry so much!”) by a friend at work who speaks Hindi and we had a fun time comparing the numbers from one to ten in Welsh and Hindi. Sadly a very quick attempt to find some other words that were similar was not so productive.
There’s an interesting family tree of languages at one of the webpages for the BBC’s "Story of Welsh" series (which I’ve not seen, must see if I can get it on DVD)..