I am Vietnamese, I use ibus to type Vietnamese on my Debian. I just started to learn Hungarian and I need to type some Hungarian characters which I can't type with ibus-unikey, like , , ,  or .Other characters like , ,... I can type with no problems as we have them in Vietnamese as well.I added Hungarian to my ibus but I still can't figure out how to type those characters.If you know how or if you know there are instructions somewhere, please let me know. I really appreciate. Thanks!
Type Hungarian special alphabets on Debian, ibus
debian;ibus
You can configure and use the composeKey:Under gnome Desktop : From the system settings choose keyboard >> keyboard layouts >>  option then Select position of compose key extend it and choose (eg: Caps Lock)To get the accented character press :[composeKey] + [accent character] + [letter]e,g:Caps Lock +   +  o =  Caps Lock +   +  u =  Caps Lock +   +  e =  Caps Lock +   +  i =  Caps Lock +  ~ +  a =  edit:Caps Lock +   +  Shift + o =  Under Kde Desktop system settings >> imput devices >> keyboard >>  Advanced >> configure keyboard option >> compose key position extend it then make your choice.