@Sanjeev Thank you for your help. Really looking forward upgrade to the next version. The current swiftmailer only accept email as a username, I need to modify swiftmailer.yaml to make SendGrid working. It's a little bit difficult for the common user.
In my installation I generate an external service translation embed code than I implemented the desired language.
You can see here. where you can find two flags: Italian and English.
Just generate embed code with only flags and not the drop down in my case than I added the code in the footer and header as <li><li/> before the Home button in main-uvdesk/vendor/uvdesk/support-center-bundle/Resources/views/Templates/footer.html.twig (or header.html.twig)
@Sanjeev I don't like the reCapcha error showed as red message on top: I think is really a bad idea because there is no read field that help user to understand what is wrong.
I believe the error as was showed before under recaptcha is more clear.
I will revert changes on my side regarding this, I don't like!
Please tell me what I need to do to remove this bad error showed on top and show again under the captcha field so will be more easy for user understand which field has issue that never allow the ticket submission.