During upgrade from 5.2 to 6.0 a section of web.config is extracted from web.config to a separate file (EPiServer.config).
In this process I noticed that the whole siteHosts-tag disappeared.
Not an error - it was moved to episerver.framework.config.
But it still looks like something went wrong in the conversion...
<siteHosts> <add name="stockholmpride.local" language="sv" /> <add name="*" /> </siteHosts>
Notice that there are a two versions and that one of them dropped the language setting.
<siteHosts siteId="pride"> <add name="stockholmpride.local:80" language="sv" /> <add name="*" /> <add name="stockholmpride.local" /> </siteHosts>
Thanks for the report, this has been added to our bug list