Text in Message form not translated

My chatbot language is set to German.

(The entire site where it is embedded is German. Most visitors are German.)

When the conversation with the chatbot reaches the point where the user can send a message then a form appears. The header of that form is not translated to German.

“Send” button and placeholder text are translated fine.

This disrupts the user experience. I attached a screenshot.

Can you please fix that?