找到JS文件，修改配置，最底下部分
public\assets\js\require-frontend.js

require(['jquery', 'bootstrap'], function ($, undefined) {//初始配置var Config = requirejs.s.contexts._.config.config;//将Config渲染到全局window.Config = Config;// 配置语言包的路径var paths = {};//注释掉系统默认语言// paths['lang'] = Config.moduleurl + '/ajax/lang?callback=define&controllername=' + Config.controllername + '&lang=' + Config.language + '&v=' + Config.site.version;//修改成en,用无痕浏览，刷新，前端就是英文，后台还是中文paths['lang'] = Config.moduleurl + '/ajax/lang?callback=define&controllername=' + Config.controllername + '&lang=' + 'en' + '&v=' + Config.site.version;// 避免目录冲突paths['frontend/'] = 'frontend/';require.config({paths: paths});// 初始化$(function () {require(['fast'], function (Fast) {require(['frontend', 'frontend-init', 'addons'], function (Frontend, Addons) {//加载相应模块if (Config.jsname) {require([Config.jsname], function (Controller) {Controller[Config.actionname] != undefined && Controller[Config.actionname]();}, function (e) {console.error(e);// 这里可捕获模块加载的错误});}});});});
});