See Story 4 on the confluence page: https://doc.ez.no/display/PR/%28n17%29+-+Languages+and+Translations#id-(n17)-LanguagesandTranslations-Story4:Asaneditor,IwanttochoosethelanguagethatIwillcreatecontentin
EZP-24328 Spike on the multi language content support in PlatformUI
EZP-24810 Add notifications about changing the language when creating the content
PR