German has an official and fully information preserving transcription to basic latin (which is really what all this talk about "anglo letters" is, just the basic latin letters in common use in the early modern era, with no diacritics at all), which can be used in official documents, too. Other languages, like latinized Turkish, obviously copied the diacritics, but seem to have left out the transcription rules, most probably because they borrowed the letters long after their history was relevant.