Translate ERROR FORM

Hi .. I need your support because I can not translate the sentences of the form contact.

In particular the following:

Errors found in the form
There is a problem with the form, please check and correct the Following:

I tried searching for these phrases in PO file translate but are not in that file.

Can you tell me where to find the file and edit these phrases?

Thank you

Davide

Settings -> Form click on the [errors] tag to edit it.
Regards