In tour.golang.org second page (https://tour.golang.org/welcome/2) the user can choose a language.
Some of the languages work, but some result in "500 Server Error" page.

Specifically, the languages and corresponding domains that do not work:

• Arabic (https://go-tour-ar.appspot.com/)
• Traditional Chinese (https://go-tour-zh-tw.appspot.com/)
• German (https://go-tour-de.appspot.com/)
• Hebrew (https://go-tour-he.appspot.com/)
• Italian (https://go-tour-ita.appspot.com/)
• Romanian (https://go-tour-ro.appspot.com/)
• Russian (https://go-tour-ru-ru.appspot.com/)
• Spanish (https://gotour-es.appspot.com/)
• Turkish (https://go-tour-turkish.appspot.com/)
• Ukrainian (https://go-tour-ua.appspot.com/)