In German instead of ä, ö and ü they write ae, oe and ue when there are using a keyboard without Umlaut vowels, or when otherwise needed like in URL names (e.g. Süddeutsche --> sueddeutsche.de). Now, what if an Hungarian is abroad using a typewriter without all diacritics on the vowels? Are the German conventions for Umlaut also valid? And how are ő and ű typed?