Steam - Default language

Make sure you always see the steam page in your preferred language. You can configure the language in the language variable.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Steam - Default language
// @version      1.4
// @description  Make sure you always see the steam page in your preferred language. You can configure the language in the language variable.
// @author       Royalgamer06
// @include      /^https?\:\/\/(store\.steampowered|steamcommunity)\.com.*/
// @run-at       document-start
// @grant        none
// @namespace    https://greasyfork.org/users/13642
// @require      http://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.js
// ==/UserScript==

//SET YOUR LANGUAGE HERE
const strTargetLanguage = "english"; //bulgarian, czech, danish, dutch, finnish, french, greek, german, hungarian, italian, japanese, koreana, norwegian, polish, portuguese, brazilian, russian, romanian, schinese, spanish, swedish, tchinese, thai, turkish, ukrainian
const bStayOnPage = false; //true, false

//DO NOT TOUCH BELOW
this.$ = this.jQuery = jQuery.noConflict(true);
if (getURIParam("l") !== strTargetLanguage && !!getURIParam("l")) {
    window.location.search = setURIParam("l", strTargetLanguage);
} else {
    var cookie = document.cookie;
    var language;
    $("script[src]").each(function() {
        var match = this.src.match(/(?:\?|&(?:amp;)?)l=([^&]+)/);
        if (match) {
            language = match[1];
            return false;
        }
    });
    if (language === undefined) {
        language = (cookie.match(/steam_language=([a-z]+)/i) || [])[1] || "english";
    }
    if (language.toLowerCase() !== strTargetLanguage.toLowerCase()) {
        //ChangeLanguage(strTargetLanguage, bStayOnPage);
        $.post((location.hostname == "steamcommunity.com" ? "/actions/SetLanguage" : "/account/setlanguage"), { language: strTargetLanguage, sessionid: g_sessionID }, function() {
            if (location.hostname == "store.steampowered.com") {
                $.post("//store.steampowered.com/account/savelanguagepreferences", {"primary_language": strTargetLanguage, "secondary_languages[]": strTargetLanguage, "sessionid": g_sessionID }, function() {
                    if (!bStayOnPage) location.href = location.href.replace(/l\=[a-zA-Z]+&?/, "");
                });
            } else {
                if (!bStayOnPage) location.href = location.href.replace(/l\=[a-zA-Z]+&?/, "");
            }
        });
    }
}
function getURIParam(sParam) {
    var sPageURL = decodeURIComponent(window.location.search.substring(1).toLowerCase()),
        sURLVariables = sPageURL.split("&"),
        sParameterName,
        i;
    for (i = 0; i < sURLVariables.length; i++) {
        sParameterName = sURLVariables[i].split("=");
        if (sParameterName[0] === sParam) {
            return sParameterName[1] === undefined ? true : sParameterName[1];
        }
    }
}
function setURIParam(keyString, replaceString) {
    var query = decodeURIComponent(window.location.search.substring(1).toLowerCase()),
        vars = query.split("&"),
        replaced = false,
        i;
    for (i = 0; i < vars.length; i++) {
        var pair = vars[i].split("=");
        if (pair[0] == keyString) {
            vars[i] = pair[0] + "="+ replaceString.toLowerCase();
            replaced = true;
        }
    }
    if (!replaced) vars.push(keyString.toLowerCase() + "=" + replaceString.toLowerCase());
    return vars.join("&");
}