% Reorder Vowel Symbols
% (?P<sw1>[เแโไใไ])(?P<sw2>[กขฃคฅฆงจฉชซฌญฎฏฐฑฒณดตถทธนบปผฝพฟภมยรลวศษสหฬฮ])
(?P<sw1>[เแโไใไ])(?P<sw2>.) -> 0 / _

% Delete tone marks
[่้๊๋] -> 0 / _

% Convert อ to glottal-stop before a vowel diacritic series
อ -> ʔ / _ (า|ี|ู|เ|เ็|แ|ื-|ื|เอ|โ|อ|ะ|ิ|ุ|เะ|แะ|ึ|เอะ|โะ|เาะ|ไ|ใ|โ|ั)

% Thanthakhat (cp. Virama)
.์ -> 0 / _
