A Store must be able to provide information to its shoppers for each Language it supports. A Store supports all of its SupportedLanguages, and also supports all of its StoreGroup's SupportedLanguages.
When searching for information in a particular shopping Language, multi-language objects will first search for information in that Language. If the information is not found in the shopping Language, then the object will search for information in each of that Language's alternative Languages, in the order specified by the sequence attribute of the AlternativeLanguage object.
An AlternativeLanguage for a StoreGroup is also an AlternativeLanguage for the Stores in that StoreGroup.