animelon-subtitle-downloader.user.js

// ==UserScript==
// @name         animelon-subtitle-downloader
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  download animelon subtitles
// @author       mescyn#5794
// @match        https://animelon.com/video/*
// @grant        unsafeWindow
// @grant        GM_registerMenuCommand
// @require     https://cdn.jsdelivr.net/npm/[email protected]/dist/FileSaver.min.js
// ==/UserScript==

GM_registerMenuCommand("Download Subtitles", AnimelonSubtitleDownloader);

// downloads all subtitle options (english, hiragana, katakana, japanese romaji)
function AnimelonSubtitleDownloader()
{
    var subtitles = angular.element(dialogueHistoryLists).scope().$parent.subtitlesArray;

    for (var i = 0; i < subtitles.length; i++)
    {
        var s = subtitles[i].assString;
        var decodedSubtitles = CryptoJS.AES.decrypt(s.substring(8,s.length-5),s.substring(0,8).split("").reverse().join("")).toString(CryptoJS.enc.Utf8).replace(/undefined/g,"");
        var blob = new Blob([decodedSubtitles], {type: "text/plain;charset=utf-8"});
        var subtitle_name = "animelon_" + document.URL.split('/').reverse()[0] + '_' + subtitles[i].language + '.ass';
        saveAs(blob, subtitle_name);
    }
}

Anyone knows? which sites provide multiple substitle like animelon?

I don't know offhand but you might ask in refold japanese or migaku's discord or one of the other large japanese discords...alternately get kitsunekko subs from whatever show you're watching and use asbplayer

Hey guys. This script appears to use the Dynamic UserScript API. However, TamperMonkey's default settings are not like that, so go to the settings in the dashboard and change to expert mode, access script cookies in security settings, and Default tab types to run scripts in, All tabs.
Change the Allow scripts to access local files setting to all. And you can use it by changing the content script API to userscripts API dynamics.

Since I used Google Translator, there may be inaccurate translations. I ask for your understanding.