Given the file is large, you can try using Sort::External supplied with the following sortsub: sub { $index{$Sort::External::a} <=> $index{$Sort::External::b} } Where %index is a hash with letters from the vietnamese alphabet as its keys and their corresponding positions in the alphabet as its values.

In reply to Re: Sorting Vietnamese text by Atacama
in thread Sorting Vietnamese text by pdenisowski

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