Baidu translate api support for userscripts.
No need for baidu's token.

Usage：

baidu_translate(details): details = {
text:  Text you want to translate.
Required argument, no default value.
callback:  Callback function when translation succeed,
e.g. function(r###lt) {console.log(r###lt);}.
Argument `r###lt` will be  translate r###lt.
Required argument, no default value.
[src]:  Source language; e.g. 'zh' for Chinese, 'en' for English, 'ja' for Japanese, ....
Default: Auto detect.
[dst]:  Destination language,
Default: 'zh'.
[split]:  Text spliting max length, just leave blank if you don't know what this means.
What it is: Baidu has limited that up to 5000 letters can be translated each single API
request, so the translate function will split text by about every ${split} letters, and
translates each of them with a single API request then concatenate the translate r###lt
together again. Don't worry if any sentence to be splited, actually the translate
function splits text with '\n' first, then concatenate the '\n'-splited strings as long
as possible while keeping its length <= ${split}.
Default: 5000
[onerror]:  Callback function when translation failed,
e.g. function(reason) {console.log(reason);}.
Argument: `reason` may be anything that causes its failure, just for debugging and do
not use it in production.
Default: function() {}.
[retry]:  Times to retry before onerror function being called or an error being thrown,
Default: 3.
}
Or:
baidu_translate(text, src, dst, callback, onerror, split, retry)
Overloads:
baidu_translate(text, src, dst, callback, onerror, split)
baidu_translate(text, dst, callback, onerror, split)
baidu_translate(text, callback, onerror, split)
baidu_translate(text, callback, onerror)
baidu_translate(text, callback)
Important Note:
baidu_translate needs to be initialized before using. Don't worry, the initialization is automatic, just call bdTransReady(callback) to get your callback function called while initialized.
e.g.
// ==UserScript==
// @name               Baidu translate API test
// @name:zh-CN         百度翻译API测试
// @name:en            Baidu translate API test
// @namespace          Baidu-API-Test
// @version            0.1
// @description        Baidu translate API test script
// @description:zh-CN  百度翻译API测试脚本
// @description:en     Baidu translate API test script
// @author             PY-DNG
// @license            WTFPL - See https://www.wtfpl.net/
// @match              https://greasyfork.org/zh-CN/scripts/452362-baidu-translate
// @require            https://greasyfork.org/scripts/452362-baidu-translate/code/Baidu%20Translate.js
// @grant              GM_xmlhttpRequest
// @connect            fanyi.baidu.com
// ==/UserScript==
(function __MAIN__() {
bdTransReady(function() {
baidu_translate({
text: '欢迎来到 Greasy Fork，这里是一个提供用户脚本的网站。',
dst: 'en',
callback: function(r###lt_text) {
console.log(r###lt_text);
},
onerror: function(reason) {
console.log('something unexpected happened');
debugger;
}
});
});
})();
Expected output: