On the server, instead of the Cyrillic character "i" I get "?". What is the problem?

Question

Node.js

Hello!
When submitting the form using the GET method on the server, I get the form parameters through req.query. But all the letters "i" in Cyrillic are replaced by question marks "?". How to be? Write in value in Latin? Is it possible somehow not to replace it with the Latin alphabet, but still transfer the Cyrillic alphabet to the value? Thank you!

Answer 1

UTF-8

Answer 2

Specify the encoding in the form.
htmlbook.ru/html/form/accept-charset