Is Korean a constructed language conlang

Is Korean a constructed language (conlang)?

It is extremely unlikely.
I would not say completely impossible because we don’t have a time machine and we cannot see how the Korean language began, but it is extremely unlikely that a stone age hobbyist decided one day to make something interesting that then evolved into Korean.
Constructed languages are made with conscious effort by a person or group.
It is, again, extremely unlikely that this happened with Korean at any stage in the language’s history.
Writing was not even around in all likelihood when Korean first evolved and I doubt any stone age people were comparing languages and doing linguistics work.
There is a lot of speculation as to where Korean comes from.
It shares many phonological and syntactic features with Japonic, Mongolic, Finno-Ugric, and Turkic languages so some people speculate it might be related to them, but so distantly related that there are very few visible cognate words (for example, perhaps it diverged more than 10,000 or even 15,000 years ago).
No one I know of though thinks some Neolithic human (who already spoke at least one other language natively) consciously decided
“ok, I am done hunting deer for the day, the yurts are all finished, and the kids are now smashing the beans on the rocks like they are supposed to.
I have so much free time that I am now going to make a fun new language! Here are the pronouns…”
That sounds completely unbelievable.
It is possible within the laws of the universe though so I cannot rule it out 100%.

No, Korean is a natural language.
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