PROBLEM CKEditor language

[lotova]

Did you remove the getsimple theme somehow?
Check js console

Finally, I have the CKEditor translated and well working.
Checking javascript console was a good idea.
But the overall process was really complicated so I summarize it step by step for others who may have the same problem:
1) go to the CKEditor builder (http://ckeditor.com/builder), there: upload the build-config.js file from your GetSimple installation (/admin/template/js/ckeditor/) through the same-labeled button, choose Full preset above it, let the available skin be preselected, add your preferred language to the left column (Your editor’s language) at the bottom of the page and then download;
2) extract the downloaded archive elsewhere in your harddisk, you obtain the folder "ckeditor";
3) back up the file /admin/template/js/ckeditor/config.js and the folder /admin/template/js/ckeditor/skins/getsimple, then completely remove the folder ckeditor from your GetSimple installation (but back up it);
4) copy your downloaded folder "ckeditor" to the place of the same recently removed folder in your GetSimple installation;
5) replace the file /admin/template/js/ckeditor/config.js with the same backed up file, remove the skin from the folder /admin/template/js/ckeditor/skins and copy the backed up folder "getsimple" in it;
6) if the CKEditor is missing in your editation pages now, check the browser console (e.g. Ctrl-Shift-K in Firefox, F12 in Chrome) and copy potentially missings folders to the folder /admin/template/js/ckeditor/plugins from your GetSimple installation (you need your backup now);

and that's all (at last).