[natural_translit] Add new Phon class. Add vowels and pulmonic consonants with dedicated IPA symbols to the multilingual Phon inventory. The default phonological features are derived from the location of the phoneme on the IPA table.

[natural_translit] Add new Phon class. Add vowels and pulmonic consonants with dedicated IPA symbols to the multilingual Phon inventory. The default phonological features are derived from the location of the phoneme on the IPA table. #2254