That site is certainly a weird profusion of partial information.
Why does it talk about the Indo-European languages? It seems to be saying they are the only languages anyone speaks. Claiming Hittite as their original language is as strange as saying English comes from German. Yes the case structure of modern German nouns is closer to Old English but take these examples:
Cheek is Wang in German. Chaucer says, "My wonges waxeth wan" in a poem meaning "My cheeks grow pale". So wong is the old word for cheek and German shows you the old form. Right? Wrong. Old English had synonyms ceoc and wong. Wong died out and ceoc became cheek.
Ship is Schiff in German. "Sir Patrick Spens" has
The king sits in Dumferling town
Drinking the blud red wine.
"O, where will I find me a skilly skipper
To sail this new skip of mine."
Both are derived from an early form skip (spelled scip) and ship, skipper and skiff are the English derivatives. The modern English forms are all closer to the original than modern German.
Water is Wasser in German. Unlike other European languages English has not shifted a W sound into a V. The English word has not changed and the German word is derivative.
in 9000 BC is impossible since we don't have records in Neshili (the Hittite language's name for itself) before 1600 BC. We are talking a 7500 year gap here. Neshili disappeared aroung 1200 BC. I find that reading Elizabethan English or before I have to slow down to decode it as I stumble along. But I can read English of the Restoration at a normal speed so I'd say modern English is about 1600 AD. The gap between English and Neshili is just 2800 years. At that rate English is closer to Neshili than Neshili was to Indoeuropean.
BTW, the first sentence decoded from Neshili was: "NU NINDA-AN EZZATENI, WATAR MA EKUTENI" written in phonetic cuneiform. Ninda is a borrowed word from Akkadian and means bread. Guessing from Indoeuropean roots, it is "Now bread-(accusative case) you-eat, water then you-drink." So there is the anomaly of a modern English word sticking out in an ancient text.
There are a lot of language families other than the Indo European. Why focus on it?
