Suport for hidden value?

Thankyou for this simple and helpful Plugin, it is easy and works reliable.

I think there is only one missing thing, that could be implemented in future version: Translating hidden field value.

Example:

[hidden wpcf7redirect "{/en/inquiry/thankyou/}"]

The output is always

<input class="wpcf7-form-control wpcf7-hidden" value="{/en/inquiry/thankyou/}" type="hidden" name="wpcf7redirect">