"The bad kappa!"
Translation:το κακό κάππα!
That is inefficient indeed. You can change your keybord configuration to greek: Go into the settings of your computer. There you choose the language section. When you choose "Add language", you get a menu from which you can choose out of all available languages. You can choose "Greek" then.
If you have done this, you will be able to switch back and forth between latin letters and greek letters. You can do so in the task section.
I hope this helps you, I can't be more precise here since I don't know what your native language or the system on your computer are.
to kako kappa was not accepted. I know the course is in beta so the transliteration needs to be fixed. Also the other language courses are not so strict with the accented letters. Polish & Hungarian for example will take a regular a or o for the letters in their alphabets with accents and diacritics.