This is the 6246th most frequent Polish word.
bernardo
The word "bernardo" is not a Polish word.
Here, 'Bernardo' is used as a proper noun, referring to a person named Bernardo.
Bernardo jest świetnym kucharzem.
Bernardo is an excellent chef.
In this sentence, 'Bernardo' again functions as a proper noun, referring to the same individual within a question context.
Czy Bernardo pomoże nam dziś wieczorem?
Will Bernardo help us this evening?
This usage of 'Bernardo' addresses the individual directly, employing the vocative case for direct communication.