Frisian is very similar to English
Frisian is very similar to English
"Bread, butter and green cheese is good English and good Friese," which is pronounced more or less the same in both languages
(Frisian: "Brea, bûter, en griene tsiis is goed Ingelsk en goed Frysk.")
Interestingly, English has become a world language, while Frisian must fear extinction. 10 centuries ago, neither development would be predictable.
Languages of massive empires rarely die out; they might be transformed (such as when Latin gave birth to an entire family or related languages), but outright disappearance is typically not their fate.
The curious thing about English is that it gained a massive role after spending almost a thousand years of its previous existence as a niche language spoken on a small island on the edge of Europe.