Those are just application start events being logged. They happened to occur when a browser with non english as the preferred language made a request so they are localized to a different language. So in other words your site goes to sleep (application shuts down) when there is no traffic and then you get a request from China that wakes up the site and fires the application start event. So you seem to be getting traffic from China on a regular basis or at least a web browser with the preferred language set to Chinese. Basically the executing thread gets set to a specific culture and then the resource files for that language are used.
By default we have automatic localization to browser language preference but you can configure to force a specific language. ie you could force en-US if you never want any auto localization, then you would only see English in the log.
Hope that helps,