How do you know that Korean and Gojoseon people speaks same language?

Student B: I read his Book. It is fascinating concept and mesmerizing story.

It is a huge subject covering over four Kilo-years spreading out wide region in the NEA.  Dr. Mosol summarize that [Scythian spoke Tungusic language, built Gojoseon, left archaic ideograph as slave of Zhou clan.] He cited the phrase “注易，往往有高麗言”, literally Book of Changes do have Goguryeo language. Gojoseon people spread out wide region. Most of them died out.  The main trunk of Tungusic language remained in the Korea. Korean still used many words written in the archaic scriptures with same phonetics.

Mosol: Thank you for your comment. Language has few major components and evolved. Although the tone and rhythm had gone, same syntax and words are still in Korean language. I cited few sentences and wordings. Name of tribes and Family names such as “解氏, 解枇氏, 楷, 奚, 夏, 費氏” are PLCs (假借) meaning Tungusic language. They changed to PSMCs such as “禹, 高, 元, 衛, 魏, 等, 登” so on. One good example is in the family name of Deng Xiaoping. Deng(鄧; Dèng 등) is same phonetics as Nine arable land mountain ridge(洪範九疇, 鴻範九等 děng;더엉 by Korean) in Shiji. Deng Xiaoping Deng(鄧; Dèng 등, back) means a village on the mountain ridge.

Phonetics (Dèng 등) and (děng;더엉, 덩) is common in Korean language. Dèng ae Jida (등에지다) means “carrying on A Frame” as seen in Korean War. On Horse or camel back말 등에. Děngdala “덩(더엉)다라”, spine 등뼈 is another examples.