Has Toady ever made any official comment on how the symbols of the languages are supposed to be pronounced? Especially the vowels with diacritics?
I'd like to know if there's a standard version, but here's some speculation:
I assume the consonants are probably pronounced as in English, given the language of the game. I also assume that the orthographies for the in-game languages are transcribed in the same standard manner (that is, the pronunciation doesn't change between languages), as if it was a sort of international phonetic alphabet. The Human sound <Ñ> would presumably be /ɲ/ as in Spanish; but all the rest isn't obvious to me. Does Elven <Ç> represents a /ts/ (its original use), a /tʃ/ (as in Albanian, Turkmen etc.) or just an /s/ even before /i,e/ (as in French, Portuguese etc.?)
What about Elven <Y>, <Ÿ>; how are they distinct from <I>, <Ï>? Are they just notations for the gliding version of the same quality, as in English (note that only Elven and Human have <W>), or are they rounded, as in its original use or in Scandinavian languages, etc.?
And my most burning doubt: what about all the dwarven diacritics? Are they distinction in vowel quality, in tone, in vocal register, all of those, none of them? Which ones, exactly? Dwarvish has all of ◌̀◌́◌̂ for AEIOU: ◌̈ for AEIO; and ◌̊ for A, plus non-diacritic versions of all of them. The limited use of ◌̊ makes me think that it's maybe a different category than others (perhaps /aː/ → /ɔ/ ablaut as in Swedish etc.; though since DF lacks both morphology and historical developments, the notion of 'ablaut' seems untenable). Elves use only ◌̀◌́ and Ÿ; goblins, by contrast, ◌̈◌̂ but no Ÿ (but with Å); humans have only Á. Roughly, ◌̈◌̂Å are Goblin-Dwarvish, while ◌̀◌́ are Human-Elven-Dwarvish, and YŸ is an exclusive Elvinism. Perhaps ◌̀◌́ are tones and ◌̈◌̂ ablauts or registers, and dwarves the only species to use both?
(And yes, I realize the out-of-universe answer is likely "he just went through the characters available in Codepage 437 and assigned subsets of them randomly to each species"; but that ain't how we roll.)