Special characters in encryption key - different output

[Tadeas Kmenta]

Using special language native characters in encryption key result in different crypted phrase compared to native crypto node module.
Example of characters: ěščřžýáíéśćżź and way more.

Reproduction code:

    const crypto = require("crypto");
    const cryptoBrowser = require("crypto-browserify");
    const algorithm = "aes-256-ctr";
    const encryptionkey = "asdasdasdsadś gqwfwqrn";

    const encrypt = crypto.createCipher(algorithm, encryptionkey);
    let crypted = encrypt.update("123456781234565", "utf8", "hex");
    crypted += encrypt.final("hex");
    console.log(crypted); // 49a45f088f2c47cc91d62ac5290eaa

    const encryptB = cryptoBrowser.createCipher(algorithm, encryptionkey);
    let cryptedB = encryptB.update("123456781234565", "utf8", "hex");
    cryptedB += encryptB.final("hex");
    console.log(cryptedB); // 97a55dbe16a6fad4930e8122a0b554

Thank you for explanation and more insight into why it is happening and how to resolve it in case I want to have these special characters in encryption key.