Your first API request

import deepl

auth_key = "f63c02c5-f056-..."  # Replace with your key
translator = deepl.Translator(auth_key)

result = translator.translate_text("Hello, world!", target_lang="FR")
print(result.text)  # "Bonjour, le monde !"

$authKey = "f63c02c5-f056-..."; // Replace with your key
$translator = new \DeepL\Translator($authKey);

$result = $translator->translateText('Hello, world!', null, 'fr');
echo $result->text; // Bonjour, le monde!

var authKey = "f63c02c5-f056-..."; // Replace with your key
var translator = new Translator(authKey);

// Translate text into a target language, in this case, French:
var translatedText = await translator.TranslateTextAsync(
      "Hello, world!",
      LanguageCode.English,
      LanguageCode.French);
Console.WriteLine(translatedText); // "Bonjour, le monde !"
// Note: printing or converting the result to a string uses the output text.

import * as deepl from 'deepl-node';

const authKey = "f63c02c5-f056-..."; // Replace with your key
const translator = new deepl.Translator(authKey);

(async () => {
    const result = await translator.translateText('Hello, world!', null, 'fr');
    console.log(result.text); // Bonjour, le monde !
})();

import com.deepl.api.*;

class Example {
    Translator translator;

    public Example() throws Exception {
        String authKey = "f63c02c5-f056-...";  // Replace with your key
        translator = new Translator(authKey);
        TextResult result =
                translator.translateText("Hello, world!", null, "fr");
        System.out.println(result.getText()); // "Bonjour, le monde !"
    }
}