Google published the official font resources handling since support library v26 released:
<https://developer.android.com/guide/topics/ui/look-and-feel/fonts-in-xml.html>

However, looks like I cannot add country qualifier for the font resources folder.

I have an app which has 3 languages: English, Traditional Chinese and Simplified Chinese.

And I tried to name my font folder under `res` this way:  

`font`  

`font-zh`  

`font-zh_CN`  

(I have also tried `font-zh-CN`)

*(Note that `zh` is the language, while `CN` is the country. With some more context for your information - In China we all use "Chinese", but there are Simplified Chinese and Traditional Chinese; Moreover, Hong Kong and Taiwan both use Traditional Chinese but the way we use them are a bit different. Most importantly, typefaces have separate files for Traditional Chinese and Simplified Chinese, due to the fact that they are quite different in their shapes.)*

But I cannot build the project. Android Studio keeps telling me that `font-zh_CN` (or `font-zh-CN`) is an invalid resource directory name.

This does not happen for my `values-zh_CN` folder (nor `values-zh-CN`).

**Question:**

How do you use different fonts for the **same language but different country**, using the new official method since API 26?