For example India is Indien, Serbia is Serbien, Saudi Arabia is Saudi Arabien. However, some other countries are written as is: Malaysia, Namibia.
My questions are:
Why is Latin -ia written as -ien in German? I mean, why is India corrected to Indien in German given that it is a foreign (Latin) word?
Why is it applicable to some country names, not all?
I noticed this in FIFA country code list.