More likely they travelled from the near east to Wales.
Searching for the Welsh-Hindi link
http://news.bbc.co.uk/2/hi/south_asia/4328733.stm
A BBC journalist is urging helpful linguists to come forward to help solve a mystery - why the Hindi accent has so much in common with Welsh.
Sonia Mathur, a native Hindi speaker, had her interest sparked when she moved from India to work for the BBC in Wales - and found that two accents from countries 5,000 miles apart seemed to have something in common.
It has long been known that the two languages stem from Indo-European, the “mother of all languages” - but the peculiar similarities between the two accents when spoken in English are striking.
{End of excerpt. More at link.}