support Tinymce5 langs cdn https://www.jsdelivr.com/package/npm/tinymce-langs?path=langs
Currently Tinymce5 langs does not have cdn. So create an npm package, let lang supports cdn.
All cnd in jsdelivr
tinymce.init({
selector: 'textarea', // change this value according to your HTML
language: 'zh_CN', // select language
language_url: 'https://cdn.jsdelivr.net/npm/tinymce-langs/langs/zh_CN.js' // site absolute URL
});