Salvete,

Does anyone know how people schooled in the Italian style of pronunciation would pronounce diphthongi, the plural of diphthongus?

I have seen some examples of books printed circa 1700 where diphthongi is the usual spelling but occasionally an h is added to give diphthonghi. This ties in with modern Italian pronunciation dittongo s. - dittonghi pl. so maybe is a slip showing that they pronounced it with a hard g even though an i follows. Is there a specific rule for -ngi-, -nge-?

So to sum up, would diphthongi be pronunced [dif'toŋgi:] or [dif'toŋdʒi:]?

Vobis gratias ago.

Paulus