Unable to set Accept-Language

[HASCHKAKERLAKE]

Hey!

sorry but im new to puphpeteer/puppeteer...

I am unable to set a browser language. Everything i have tried results in a 'accept-language: en-US' no matter how i change it...

These are the snippets how i tried to change it:
Version 1 - Through launch parameter:

$browser = $puppeteer->launch([
    'args' => [
    '--no-sandbox', 
    '--disable-setuid-sandbox',
    '--user-agent="'.$ua.'"',
    '--lang=de-DE,de',
    '--proxy-server=127.0.0.1:8080'
    ],
    "ignoreHTTPSErrors" => true
]);

Version 2 - Through modified HTTP Header:

$page->setExtraHTTPHeaders(array("Accept-Language:","de-DE"));
$response = $page->goto($url);

Version 3 - Through custom method on navigator change:

$page->evaluateOnNewDocument('Object.defineProperty(navigator, "languages", {
get: function() {
return ["de-DE", "de"];
}
});
Object.defineProperty(navigator, "language", {
get: function() {
return ["de-DE", "de"];
}
});');

Ive doublechecked everything through a proxy (mitmdump), the language remains always the same.. Only if i specify it via setExtraHTTPHeaders i can see it as a 'double specification' in the HTTP Request which doesnt make sense..?

$page->setExtraHTTPHeaders(array("accept-language:","de-DE"));

mitmproxy dump:

127.0.0.1:43970: GET https://www.example.com/index.php HTTP/2.0
    cache-control: max-age=0
    upgrade-insecure-requests: 1
    user-agent: "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.36 OPR/82.0.4227.33"
    0: accept-language:
    1: de-DE
    accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
    sec-fetch-site: none
    sec-fetch-mode: navigate
    sec-fetch-user: ?1
    sec-fetch-dest: document
    accept-encoding: gzip, deflate, br
    accept-language: en-US

My last attempt was to implement puppeteer-extra like it is shown in the PR #149 but due to missing documentation and lack of knowledge about nodejs, puppeteer and co i was unable to get it running with the puppeteer-extra-plugin-stealth plugin...

Please help me :)

[HASCHKAKERLAKE]

So after a few hours of sleep i can answer it myself...

$page->setExtraHTTPHeaders(array("accept-language"=>"de-DE"));

My bad was to place a ':' where it should not be and also i had it as normal array, but puphpeteer/puppeteer needs it as key=>value..

So it is now working..