wae 왜
No, Korean is not an Indo-European language. It belongs to the Koreanic language family, which is a language isolate with no known genealogical relationship to any other language family.
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Korean was a language that naturally developed on the Korean peninsula. King Saejong the Great was responsible for devising the current Hangeul alphabet for the Korean language. (It previously used the Chinese ideographs -- Hanzi.) Korean is not a created language; it is not Esperanto or Klingon.
"Only for you" is written as "dangsin man-ui" in the Korean language.
You could study Korean language because you need to know the language for business or other matters, as a second language, or because you want to know the language of your ancestors, if you are of Korean heritage.
when Korean language test is coming in islamabad
Occasionally English but mainly Korean.
The language of North Korea is Korean. North Koreans call the language either Chosono or Chosonmal.
Korean
Two countries have Korean as their official language: North Korea South Korea
A Korean version is unlikely to have any other language options available.