En réponse à Trebor Jung : > >How do you write diphthongs - as (e.g.) /ai/ or /aj/? The true standard way is /a_i/ (the underscore corresponds to the IPA tiebar) which differs both from /ai/ (two vowels in sequence, but without forming a diphtongue) and from /aj/ (a vowel followed by a consonant). But many people use one of the ways you describe, when no confusion is possible. > >How do you write voiceless nasals, e.g. nasalized /p/ and /t/? With the voiceless diacritic _0 on the nasals :) . > >How do you write retroflex consonants? This has already been replied in length :) . Note that IPA has specific characters for those. Christophe Grandsire. http://rainbow.conlang.free.fr You need a straight mind to invent a twisted conlang.