please try validate:http://feeds.archive.org/validator/check?url=https://xoops.org/backend.php

Addition to my previous message...

Not the necessary variables in the language files:
_WFS_ON
_WFS_URL
_WFS_POPULAR
_WFS_SUBMIT
_WFS_NO
_WFS_TOP
_WFS_RATEFILE
_WFS_PUBLISHED
_AM_SUBMITTED


Not existing variables:
_WFS_THANKS


Not declared phrases:

\wfsection\admin\reorder.php:
- Return to Category re-order
- Categories have been re-ordered!
- Articles have been re-ordered!
- Description
- pid
- Weight

\wfsection\article.php:
- Url Link:

\wfsection\admin\config.php:
- WF-Section admin

Catz, your e-mail not working, your site closed :(

Some words and phrases of the module are not included in language
files, for example:

wfsection\admin\wfsfilesshow.php:
- Total Attached file/s:
- No Files Found

wfsection\include\functions.php:
- Visit the WF-section website for information, updates and help on its usage...

wfsection\admin\category.php:
- Yes
- No
- Also copy articles

wfsection\admin\allarticles.php:
- No Articles found
- Online
- Offline
- Reset


I have written the small program for check of variables of the module.

The below-mentioned variables are declared in language files, but not used in the module:
_AM_CATEGORY2,_AM_LAST10ARTS,_AM_GO,_AM_ALLOWEDHTML,
_AM_DISAMILEY,_AM_DISHTML,_AM_PREVIEW,_AM_EXGRAPHIC,
_AM_FILESHOWDESCRIPT,_AM_ARTICLEMANAGEMENTLINKS,
_AM_MAX40CHAR,_AM_IMGNAEXLOC,_AM_PARENTCATEGORY,
_AM_UPLOADCONFIGFILE,_AM_ARTICLESAPAGE2,_AM_NOIMG,
_AM_PIDINVALID,_AM_AFERTSETCATE,_AM_IMGUPLOAD,
_AM_IMGUPLOAD2,_AM_ARTICLE2MENU,_AM_ARTIMGUPLOAD,
_AM_BLOCKCONF,_AM_TITLE1,_AM_TITLE4,_AM_TITLE5,
_AM_ORDER,_AM_DATE,_AM_HITS,_AM_DISP,_AM_ARTCLS,
_AM_BAN,_AM_USERPATH,_AM_SHOWSELIMAGE,_AM_DEFAULTPATH,
_AM_NOCMODERROR,_AM_NOVIEWPERMISSION,_AM_DIR,_AM_MISC,
_AM_ISNOTWRITABLE2,_AM_CANNOTMODIFY,_AM_CMODHEADER2,
_AM_TURNOFFLINE,_AM_FILEDESCRIPT,_AM_NOTIFYPUBLISH,
_AM_ACCESS,_AM_PAGE,_AM_FILECount,_NOADMINRIGHTS2,
_AM_SECTIONMANAGELINK,_AM_FDCOUNTER,_AM_RENAMETHIS,
_AM_EXTERNALARTICLE,_AM_ERRORCHECK,_AM_LASTACCESS,
_AM_DOWNLOADED,_AM_DOWNLOADSIZE,_AM_FILEPERMISSION,
_WFS_COMMENTS,_WFS_POSTERC,_WFS_DATEC,
_WFS_EDITNOTALLOWED,_WFS_ANONNOTALLOWED,
_WFS_THANKSFORPOST,_WFS_DELNOTALLOWED,
_WFS_AREUSUREDEL,_WFS_YES,_PL_COMMENTSDEL,
_WFS_HTMLISFINE,_WFS_ALLOWEDHTML,_WFS_DISABLESMILEY,
_WFS_DISABLEHTML,_WFS_PREVIEW,_WFS_GO,_WFS_WRITTEN,
_WFS_THISCOMESFROM,_WFS_CATEGORYS,_WFS_POSTS,
_WFS_WELCOME,_WFS_SAVE,_WFS_POSTEDBY,_WFS_READS,
_WFS_COMMENTSNUM,_WFS_IMGADD,_WFS_NOTREADFILE,
_WFS_PAGEBREAK,_WFS_NOVIEWPERMISSION,_WFS_WEBLINK,
_WFS_VOTEFROMYOU,_WFS_DESCRIPTIONC,_WFS_EMAILC,
_WFS_CATEGORYC,_WFS_LASTUPDATEC,_WFS_DLNOW,
_WFS_VERSION,_WFS_SUBMITDATE,_WFS_DLTIMES,
_WFS_SUPPORTEDPLAT,_WFS_HOMEPAGE,_WFS_HITSC,
_WFS_RATINGC,_WFS_ONEVOTE,_WFS_ONEPOST,
_WFS_NUMPOSTS,_WFS_COMMENTSC,_WFS_MODIFY,
_WFS_VSCOMMENTS,_WFS_EDIT,_WFS_BYTES,
_WFS_MUSTREGFIRST,_WFS_CATEGORIES,_WFS_TIMES,
_WFS_IMGNAME,_WFS_SMILIE,_WFS_EXGRAPHIC,
_WFS_GRAPHIC,_WFS_NOIMG,_WFS_ARTIMGUPLOAD,
_WFS_NOTITLE,_WFS_NOMAINTEXT,_WFS_DBUPDATED,
_WFS_ARTICLEADDIT,_WFS_DISCLAIMER

Many variables already globaly defined in the language\<your_language>\global.php:
define("_NO","No");
define("_YES","Yes");
define("_EDIT","Edit");
define("_DELETE","Delete");
define("_SUBMIT","Submit");
,etc.

Please correct in the \wfsection\language\english\main.php file this variables:
define("_WFS_TITLEZTOA","Title (Z to A)");
define("_WFS_TITLEATOZ","Title (Z to A)");

when i'm can informing you a xoops2 bugs?
In this forum or e-mail?

I'm create full russian localization for current dev.xoops2 (with install, kernel, modules localization. It's pack need for XOOPS team?