I am using mac 10.10. My keyboard input source is set to Hiragana, but when I type into a Gimp text layer, the regular latin characters appear and not the Japanese that I expected. How do I get this to work?
If you want to write in japanese you need to use japanese fonts and not latin or others. You can find online a lot of fonts http://www.freejapanesefont.com/ Switch the language of your mac in japanese ( system > language > Add Japanese ). Then select japanese and try to type in gimp. After if you want to write english again come back to system preference.