Form field name localization

Hi

How can I set the form field name localization to match the user language?

The textarea form field name is "comment" and has a min length of 10 characters set in the validationRules

English: "The comment field must be at least 10 characters in length."
Portuguese: "O campo comment deve ter pelo menos 10 caracteres."
French: "Le champ comment doit contenir au moins 10 caractères."

So, "comment" is always set to the field name, but I would like to set is proper localization.

How can I do this?

Thanks