tamarin

@Gunu,
Now I understood everything and changed it.
Thank you very very much.

@gunu,
I do not understand this sentence:

In the (Google XML Sitemaps v3 for qTranslate) plugin folder is a file named – sitemap-qtranslate.php
search qtrans_ and replace it with qtranxf_

I found the file sitemap-qtranslate.php.
And then what?
Can you help me please?
Thank you in advance.

@gunu,
I disabled the plugin CKEditor for WordPress, and everything is working properly.
It′s clever!
Thank you very much!

@Gunu,
I did everything, as you wrote in the message #2.
Nothing changed.

PS:
I use:
Theme: Generous
Plugins (active):
Akismet
All In One SEO Pack
CJ Change Howdy
CKEditor for WordPress
DMSGuestbook
Fast Secure Contact Form
Google Analytics
Google XML Sitemaps
Jetpack von WordPress.com
KeyCAPTCHA
Multicolor Subcribe Widget
Music Store
Page Links To
qTranslate-X
SEO Keyword Page
Simple Subscribe
TinyMCE Advanced
UpdraftPlus – Backup/Restore
Viper’s Video Quicktags
WPFront Scroll Top
Wp Post Views Counter
WP QR Code Generator
WP Super Cache

WPtouch Mobile Plugin
WP Ya.Share

Thanks for your reply.
If I disable the plug-in and remove it through ftp, will it not disappear the translation pages?