I wrote:
> Nguyen Le Hoang Kha <nlh...@gmail.com> writes:
>> Most of the time in Vietnamese language, there are up to 2 accents in a
>> character. These unaccent rules are added to handle such cases (which are
>> very common).

> I can't see any reason not to add these --- any objections out there?

Oh, wait a minute.  Patching unaccent.rules directly isn't the way
to do this; that file is supposed to be generated by
generate_unaccent_rules.py.  Can you see how to modify that script
to produce these rules?

                        regards, tom lane


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