I cannot type letter ‘ç’ (’+c) with English (US, alt. Intl.) keyboard, the letter ‘ć’ coming out instead. Its working fine before I upgrade the systems weeks ago. I try to change the keyboard layout but I can't find a layout with ‘ç’ by compose (’+c), my keyboard and my system are English(US).
with the Compose key set and with an English (UK) keyboard, pressing Compose then c then , (comma) in succession creates the cedilla character
Note that the 3 key presses "latch" (i.e. you don't need to hold the keys) so there is no need for finger Olympics in order to achieve the successive key presses.
Add this to your /etc/environment
You may also need to add the cedilla module to the English language, in my case it came by default: