On 23 mars 2015, at 22:05, John Brownie wrote:
> For certain languages, most notably Korean, Chinese and Japanese, there are input methods which are not customisable. Although they appear in the Keyboard section of System Preferences (in Yosemite, at least), they do not behave like keyboard layouts that can be customised. It's just not possible to customise these input methods requires a programmer, not just a keyboard layout.
If you go inside the IM apps, you can usually find .keylayout files in the Resources folder. I think it may be possible to customize these in some circumstances. I was once able to do it in the TamilIM to fix a bug in Apple's layout.