How to stop automatic switching of keyboard language

[jineu21]

Hi. I am using Korean and English on my keyboard. When I type in Korean, I type in a lot of abbreviations, and Word often types English words instead of the Korean words I typed in. I am not talking about automatic detection of the input language or spell check language. I am talking about a mechanical typing discrepancy--I type Korean words and get English words in Word. Can someone tell me how to stop this? I am using Word 2007.