Look at the image below.
It is impossible to make translation of these values (yes, no) on other languages
These values are absent in language files
Hello freedom,
in the Frontend language file en-GB.com_joobb.ini is missing the entries CM_YES = yes and CM_NO = no. Please insert your language file and everything is perfect.
Best regards
Olaf
Thanks, I long searched for the reason, but could not find
Thanks 

Hi freedom,
I asked Chiefmaster Translator Olaf for help today because I also didn't find the reason!
(it's my software but...) Thank you very much for your report.
Kind regards,
Robbie
PS: Once again thx to Olaf.
I fixed it in SVN (Joo!CM).
About is not present, it unfortunately does not help. I have hurried with the message above
Hi freedom,
I fixed it now.
You can download the files from SVN if you want:
\components\com_joocm\views\editsettings\view.html.php
\language\en-GB\en-GB.com_joocm.ini
Kind regards,
Robbie