security - Sitecore 8 - 404 error when changing language in experience editor -

i have set new role in sitecore 8 (update 3) instance , have assigned following roles (as giving read/write access content tree):

sitecore\sitecore client translating sitecore\sitecore client users sitecore\sitecore client authoring sitecore\sitecore client designing 

when logged in , using content editor, can change language ok. when change language in page editor experience editor however, (using experience > language menu item) 404 error. if clear url in browser root (hostname) language appears have been changed.

edit: additional information

it's worth noting that:

1. the solution not use translated items. have separate content tree (within single instance) each site/language.
2. the linkmanager configured use displayname url.

please share snapshot of new content tree structure , link manager config settings if possible. meanwhile, can please revert link manager settings , check if works fine? use firebug net tab persist see urls requested while click on second language.

also, please check following cookies values if updated your-site-name#lang:- website#lang

here webiste name of default sitecore site

moreover, when experience editor loaded, make sure, click on default language language menu see if works default language.

as said keep firebug open persist , keep eye on net tab see if resource request having 404.