update languages list (#569)

Author: lawreka

navigation/localization.mdx

@@ -4,7 +4,22 @@ title: Localization
 
 `"languages"` in your `docs.json` can be leveraged to partition your navigation into different languages.
 
-We currently support localization in English (`en`), Chinese (`cn`), Spanish (`es`), French (`fr`), Japanese (`jp`), Portuguese (`pt`), Portuguese (Brazil) (`pt-BR`), and German (`de`).
+We currently support localization in the following languages:
+
+* Arabic (`ar`)
+* Chinese (`cn` or `zh`, `zh-Hans` for Simplified and `zh-Hant` for Traditional)
+* English (`en`)
+* French (`fr`)
+* German (`de`)
+* Indonesian (`id`)
+* Italian (`it`)
+* Japanese (`jp` or `ja`)
+* Korean (`ko`)
+* Portuguese (`pt`)
+* Portuguese (Brazil) (`pt-BR`)
+* Russian (`ru`)
+* Spanish (`es`)
+* Turkish (`tr`)
 
 ```json docs.json
 {