Since BlackBerry 10 launched I have been hearing users ask me if Korean language inputs are supported. Sadly at the launch of the Z10 the input was not available though I think you could read Korean. Now with the latest BlackBerry 10.1 OS I am happy to report that Korean language is supported. It even offers the same keyboard natural language prediction. (Thanks Gene for helping confirm this)
Now Korean users just need Kakaotalk to come to BlackBerry 10.