Raviji,
Do you think Sanskrit has nothing common with English? Most of the English words are derived from Sanskrit. Some examples-
Brother=भ्रातृ
Mother= मातृ
Father=पितृ
Door=द्वार
Sanskrit is not restricted to Hindi only. It is the mother of many many world languages including english as well as Indian languages. The pre-Classical form of Sanskrit is known as Vedic Sanskrit, with the language of the Rigveda being the oldest and most archaic stage preserved, its oldest core dating back to as early as 1500 BCE,[Macdonell (2004] qualifying Rigvedic Sanskrit as one of the oldest attestation of any Indo-Iranian language, and one of the earliest attested members of the Indo-European language family.[Burrow (2001]
Since both have commonality and since sanskrit was earlier only a spoken language, shift of sound is possible. Grimm's law explains the shift of sounds.
But How do you restrict Kalkhandas to Hindi region and Hindi language only?
If you or any other member have any other evidences may please enumerate.
Regards,