Trần Thế Trung

Today, there are 2 styles of spelling in Vietnamese, one is "old", the other "new". The "old" style basesis based on the "symmetry", while the "new" basesis based on a theory of pronunciation.

Example : [[hòa]] is exactly equivalent to [[hoà]], where "hòa" is the "old" style, "hoà" isthe new style.

Here is an attemp to list all cases thatwhere the two styles are differently spelled.

Also, "i" and "y" can be interchanged, if they are used at the '''end''' of the base word and there is only a '''consonant''' right infrontin front of them. E.g. "lí" = "lý".