You will need a separate dish to receive international channels. As for the subtitles, you won't get english subtitles unless the program you are watching has subtitles added to them by the show's producers. I have the Filipino package and most shows/movies have English subtitles automatically on the screen. There is no way to turn them off because they are part of the picture.
No subtitles for Korean channels when I have had it as a freeview other than as Marcingak describes. TVJapan has limited programming with it.
Most all (or all) international programming requires getting the 118 satellite. If you use the Western Arc it does not necessarily require a second dish, it does if you are using the Eastern Arc.
I have the Korean Channels. I will report back on the english subtitles. I really like the Korean channels because there is a few English channels that come with the package.