UNITED NATIONS GROUP OF EXPERTS ON GEOGRAPHICAL NAMES (UNGEGN)
The Conference,
Recognizing that the accents and diacritical signs which accompany the Roman alphabet letters of many languages are an integral part of the spelling of these languages, in which they express such essential features as the tonic accent, the length and degree of openness of vowels, and other significant aspects of pronunciation and meaning,
Recommends that in international use all geographical names officially written in these alphabets by the countries concerned should remain unmodified and keep their distinguishing marks, even, and indeed particularly, when they are written in capital letters.