Can we have only one language for the world?
See the following German words, (… and corresponding Indian words).
You would think Indo-Europian theory of language is valid. But still such a theory might be adhoc and simply a manipulation of what we see in a few instances.
In my years of analysis of words and phonetics (and alternation of elements etc) this is what I observed.
There are two categories.
The first prefers Sanskrit as a language, or even any source.
The second one prefers arbitrary factors, what I call sun theory, it can be called as a Sanskrit hypothesis, that is analysis can lead to matching + unification, but not any particular language. I am for the latter.