The default language (alternative language) is the database language in which database content is displayed if attribute values are not specified in the database language used. Using this, for example, you prevent names from being displayed as (Untitled) if they have not been specified in the relevant database language. When you create a database, English (United States) is selected automatically.
Always select the database language in which all attribute values are specified as the alternative language.
For example, if all your database content is specified in English and some in German, select English as the default language. Users who log in using the German language will also see database content in English that has not been specified in English.
On the Administration tab, you can change the default language.