Language Code for Kyrgyz: ky (http://en.wikipedia.org/wiki/Kyrgyz_language)

$locale -a|grep ky
ky_KG
ky_KG.utf8

system-config-language-1.3.5-21.fc19.noarch

system-config-language-1.3.5-22.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/system-config-language-1.3.5-22.fc19

Package system-config-language-1.3.5-22.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing system-config-language-1.3.5-22.fc19'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2013-6233/system-config-language-1.3.5-22.fc19
then log in and leave karma (feedback).

system-config-language-1.3.5-24.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/system-config-language-1.3.5-24.fc19

system-config-language-1.3.5-24.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

I installed Fedora 19 Beta Mate edition, I can't set my language to kyrgyz

Log from terminal

[chynggyz@localhost ~]$ system-config-language
Traceback (most recent call last):
  File "/usr/share/system-config-language/language_gui.py", line 179, in okClicked
    self.apply()
  File "/usr/share/system-config-language/language_gui.py", line 245, in apply
    grpid = lang_dict.get_groupID_from_language(defaultLang)       
  File "/usr/share/system-config-language/lang_dict.py", line 169, in get_groupID_from_language
    return languages_Dict[language]
KeyError: 'ky_KG.UTF-8'

I can reproduce this. Looks like while integrating patches upstream, this bug fix got missed in 1.3.6 release. Will fix this soon.