Hrm. What about: 
s/(?<!,)"(?!,)/\\"/g;

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Which works at long as there are no spaces between the comma and the starting/ending quotes, since you can't add a variable length negative look behind, you'll just have to add spaces if necessary.

In reply to Re: Text::CSV::Simple parsing issue by BUU
in thread Text::CSV::Simple parsing issue by SamCG

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