Okay -- the alphabet is only 93 characters per the link in 1068127; you had seven characters extra.
in reply to Re^3: Sorting Vietnamese text
in thread Sorting Vietnamese text
You should clarify what the relation between monosyllables and polysyllables is, and what is the desired collation behaviour between them.
My current tr/// (/d still not doing what I expect it to):
$secondary =~ tr#aàảãáạăằẳẵắặâầẩẫấậbcdđeèẻẽéẹêềểễếệfghiìỉĩíịjklmnoòỏõóọôồổỗốộơờởỡớợpqrstuùủũúụưừửữứựvwxyỳỷỹýỵz#\x00-\x5d#d;