Translation with .mo & .po files

I think it would be a better idea to use the get text function to translate these files. The solution provided in this plugin isn′t flexible enough to detect what language the user is using to automatically give him the right validation messages in his language of choice. I am a user of the PRO version an I hope you can do somthing with this soon.
Thanks.

https://www.ads-software.com/plugins/vfb-custom-validation-messages/