[Cerrado] WPML not translating the sucsess message and form name

Background of the issue:
I am trying to ensure that the newsletter form's thank you message and form name are translated correctly into SL or IT. When we fill out the newsletter form, we receive the thank you message in English instead of Slovenian or Italian. The form name sent to SendPulse is also from the English form (global_form_EN) instead of the Slovenian or Italian form. I found an old post suggesting that these messages depend on the browser language, which I changed from English to Slovenian, but the message was still in English. The issue can be seen on this page: enlace oculto

Symptoms:
The thank you message and form name are not translating into the desired languages (SL or IT) and remain in English despite changing the browser language.

Questions:
Why is the thank you message not translating into Slovenian or Italian?
Why is the form name sent to SendPulse not changing to the correct language version?