General :: Android Backup On Lenovo Phone

I know that a Android backup is a snapshot of a system image. I wish to know if this backup will also include language files in a multi-language ROM.I bought a Lenovo phone (S890) but it only came with Chinese and English, My friend has the same phone but his came with a Multi-language ROM. I thought since we both have the same phone we can try and install the same recovery software on both phones. I can then create a Android backup on his phone and use that backup on my phone to get Multi-lang too.