How can I add new Language Code ?

Hi,
Whenever you add a language in the editor, you can select any from the dropdown list or you can type your custom Language name / Language code.

However, if you want the language/code to show in the dropdown list, just add an entry for each new combination in the GoogleLanguages.cs file.
There you will find a list of all the languages, with their code and the code used by google translator (as not all codes/variations are supported by google)

e.g. You can add this
That will update the dropdown lists and whenever you click to autotranslate with Google Translator, it will get redirected to the supported language codes (zh-CN, zh-TW)

Hope that helps,
Frank