Add a new laguage (Bengali) in my Huawei Honor 3C phone not having this language How to add a new language "Bengali of India" in my Huawei Honor 3C phone not having this language.

I have checked SETTINGS -> Language / Input and my language is not listed here.

I saw Samsung Phones has Bengali Language in Languages List as I have Samsung Tab311.

So how to add this new language in my honor 3C Android Phone 4.2.2 JellyBeans
Bengali is only available as a system language starting with Android 5.0.0 Lollipop. So you can't add it as a  system language ( I don't know about options with root). However, you can configure Bengali input using a custom keyboard option such as Google Keyboard or Swiftkey Keyboard. These have a "Languages" option for adding languages.