I type in both French and Polish and therefore require both the 'ç' and 'ć' characters to be easy to enter. According to compose key documentation I find on the Internet, for example at http://hermit.org/Linux/ComposeKeys.html, ,+c = ç and '+c = ć. Yet, composing either of these results in 'ç'.
I have my language set to U.S. English in UTF-8:
$ echo $LANG
en_US.UTF-8
$ echo $LANGUAGE
en
The following lines in my /usr/share/X11/locale/en_US.UTF-8 corroborate that my compose key should not be behaving this way:
<dead_cedilla> <c> : "ç" ccedilla # LATIN SMALL LETTER C WITH CEDILLA
<Multi_key> <comma> <c> : "ç" ccedilla # LATIN SMALL LETTER C WITH CEDILLA
<Multi_key> <cedilla> <c> : "ç" ccedilla # LATIN SMALL LETTER C WITH CEDILLA
<dead_acute> <c> : "ć" U0107 # LATIN SMALL LETTER C WITH ACUTE
<Multi_key> <acute> <c> : "ć" U0107 # LATIN SMALL LETTER C WITH ACUTE
<Multi_key> <apostrophe> <c> : "ć" U0107 # LATIN SMALL LETTER C WITH ACUTE
I am running Ubuntu 12.04.
Can anyone reproduce this issue? If so, can anyone offer an explanation and/or a solution? Interestingly, in this post the user is experiencing a similar but opposite issue.