Cfrgtkky

On my Windows machine, I use USA International with deadkeys, and I have no problem typing ç (' + c). However, on my Ubuntu machine, I set my layout to "USA - International (with dead keys) and that key combination returns ć. How can I have it return a C with a cedilla rather than an acute accent?

Using keyboard layout "USA - intl (AltGr dead keys)", I can get ç or Ç by pressing:

• 
  AltGr + ,: ç
  


• 
  AltGr + Shift + ,: Ç
  

At a glance, these layouts all appear to have keys for typing ç:

$ sgrep -o '%rn' '""" _quote_ """ in ("name[Group1]" .. "n" in outer("{" .. "}" containing "ccedilla"))' /usr/share/X11/xkb/symbols/??

Andorra

Albania

Azerbaijan

Belgium

Brazil

Brazil - Eliminate dead keys

Brazil

Brazil - Dvorak

Brazil - Nativo

Brazil - Nativo for USA keyboards

Brazil - Nativo for Esperanto

Canada - French (legacy)

Canada - Multilingual, first part

Canada - Multilingual

Congo, Democratic Republic of the

Switzerland

Switzerland - German (Macintosh)

Czechia - UCW layout (accented letters only)

Spain

Spain - Eliminate dead keys

Spain - Dvorak

France

France - Bepo, ergonomic, Dvorak way

France - Breton

France - Macintosh

United Kingdom - Extended - Winkeys

Ghana - Fula

Iran - Kurdish, Arabic-Latin

Iceland

Iceland - Macintosh

Italy

Italy - Eliminate dead keys

Italy - Macintosh

Italy - Georgian

Nigeria - Hausa

Norway - Dvorak

Norway - Northern Saami

Portugal

Portugal - Eliminate dead keys

Portugal - Nativo

Portugal - Nativo for USA keyboards

Portugal - Nativo for Esperanto

Russia - Chuvash

Russia - Chuvash Latin

Senegal

Turkmenistan

Turkmenistan - Alt-Q

Turkey

Turkey - (F)

Turkey - International (with dead keys)

Turkey

Taiwan

USA - International (with dead keys)

USA - Dvorak international

USA - Programmer Dvorak

USA - Macintosh

USA - Colemak

Brazil or us_intl, where you can do ' + c if language is set to portuguese (brazil)

You can change your keyboard to English (US, international with dead keys) as said in this question:
Can't write accent characters in Ubuntu 14.04

With this change letters with accents (á, é, ú, ô, ã) will work except ç. You will need to change your system language to Portugue(Brazil) or you won't be able to write ç.

The Portuguese layout allows you to type this character.

Very easy! Just go to: System settings --> Keyboard Layout --> English (US, alternative international). This should be your layout. For some test try: ç = ' + c â é à...

Check this link: https://github.com/marcopaganini/gnome-cedilla-fix

With this your are able to type cedilha without having to change the input method.

I found this answer on superuser which worked for me on Ubuntu 18:

It's because the cedilla module isn't loaded by default when the
locale is set to en, so you have to change the configuration files
for gtk to add them:

1. Edit configuration files:

sudo vim /usr/lib/x86_64-linux-gnu/gtk-3.0/3.0.0/immodules.cache



sudo vim /usr/lib/x86_64-linux-gnu/gtk-2.0/2.10.0/immodules.cache

On both, find the lines starting with "cedilla" "Cedilla" and add
:en to the line. Something like this:

"cedilla" "Cedilla" "gtk30" "/usr/share/locale"
"az:ca:co:fr:gv:oc:pt:sq:tr:wa:en"

2. Change the Compose file:

sudo sed -i /usr/share/X11/locale/en_US.UTF-8/Compose -e 's/ć/ç/g' -e 's/Ć/Ç/g'

3. Instruct the system to load the cedilla module:

Add those lines to /etc/environment:

GTK_IM_MODULE=cedilla

QT_IM_MODULE=cedilla

Reboot and you are done.