Chinese language at package level

One of our customer has an issue regarding - Chinese language at package level-. Here is the details : When they are sending the package with language code like below but it still setting “English” only in OneSpan. They have tried different options and still not working .withLanguage(new Locale("zh","CN")) They used REST Api to directly change the language using below and able to set the Chinese language package properly. “language” : ”zh-CN” Now the issue is that , when they are trying to get description of documents of the package ., it is giving an error ‘invalid locale format zh-CN’ document.getDescription()