It is often a problem to correctly visualize Belarusian-specific characters with Netscape. This is due to that Netscape 4.x looks for any koi8-r font and, if it finds one, they refuse to use other fonts for displaying Cyrillic pages.
The problem is solved by removing koi8-r fonts from everywhere - X Window System font path and font server path.Then install koi8-ru, iso-8859-5 or windows-1251 and run
xset fp rehash
Links to koi8-ru, iso-8859-5 and windows-1251 cyrillic fonts for X Window System can be found at the bellinux page
In order to view Belarusian sites, you have to set up you console to handle the encoding you need. See section the section called Belarusian in console for more details.
Add the following lines to your .linxrc file.
character_set=Cyrillic (windows-1251) preferred_language=be preferred_charset=windows-1251
character_set=Cyrillic (ISO-8859-5) preferred_language=be preferred_charset=iso-8859-5
If the page you are browsing does not have an explicit charset declaration, press o and set the document charset manually.