What effects did the Korean War have on?

Answer 1

I assume by the phrasing the the question is asking about the language.

The Korean language has been altered as a result of the Korean War. The isolation of North Korea has allowed the Korean language there to change more rapidly and in a different direction from the Korean language spoken in South Korea and among Korean expatriates. The Northern accent is a little odd to the Southern ear, but relatively understandable. Northerners understand South Koreans better than South Koreans understand Northerners because of increased similarities between "modern" South Korean Korean and the Korean of the 1950s.

However, since the Hangul alphabet long predates the US/Soviet division of the Peninsula, both North and South Korea continue to use this endemic alphabet.

Answer 2

I assume by the phrasing the the question is asking about the language.

The Korean language has been altered as a result of the Korean War. The isolation of North Korea has allowed the Korean language there to change more rapidly and in a different direction from the Korean language spoken in South Korea and among Korean expatriates. The Northern accent is a little odd to the Southern ear, but relatively understandable. Northerners understand South Koreans better than South Koreans understand Northerners because of increased similarities between "modern" South Korean Korean and the Korean of the 1950s.

However, since the Hangul alphabet long predates the US/Soviet division of the Peninsula, both North and South Korea continue to use this endemic alphabet.