Greasy Fork is available in English.
Show Single zh-CN subtitles when you're watching coursera, and you may modify the script manually as you like!
// ==UserScript==
// @name Show zh-CN Subtitles for Coursera
// @name:zh 于 Coursera 显示中文（简体）字幕
// @namespace http://tampermonkey.net/
// @version 1.0
// @description Show Single zh-CN subtitles when you're watching coursera, and you may modify the script manually as you like!
// @description:zh 在 Coursera 显示中文（简体）字幕，或手动更改脚本来更换其它语言
// @author Franklin Li
// @include http://www.coursera.org/*
// @include https://www.coursera.org/*
// @grant none
// @run-at document-end
// ==/UserScript==
(function() {
'use strict';
setInterval(function(){
var video = document.getElementById("c-video_html5_api");
if(video){
var n = video.textTracks;
var bsubtitleoff = true;
for (var o = 0; o < n.length; o++) {
var i = n[o];
if (i.kind !== "subtitles") continue;
if (i.language == "zh-CN") i.mode = "showing";
}
}
},500);
})();