Document.FarEastLineBreakLanguage (Word)

Returns or sets a WdFarEastLineBreakLanguageID that represents the East Asian language to use when breaking lines of text in the specified document or template. Possible return values are wdLineBreakJapanese - Japanese, wdLineBreakKorean - Korean, wdLineBreakSimplifiedChinese - Simplified Chinese, wdLineBreakTraditionalChinese - Traditional Chinese.

ActiveDocument.FarEastLineBreakLanguage = wdLineBreakKorean