Our I18N switches content by checking user's web browser locale. Configuration for this is described here - http://wiki.magnolia-cms.com/display/WIKI/Introduction+to+I18nContentSupport. However, navigation paragraphs that use <msd:navigation /> tags, those which automatically display all pages from a specified node, seem to create URLs in different form, that contains /[locale]. We need to see if we can correct this by any setting or easy fix or ask support to help with this issue.