Install another language to Android keyboard I have Lenovo a390 with goKeyboard by default, and I have tried installing Serbian Keyboard to it. I have downloaded it from Play store and nothing happens, but never mind. 

Simple question is this: Is there a way to install new language to default Android keyboard? So I don't have this language in list of installed languages that I can choose from. I want to add a new language.

Is this possible? I would really like to avoid using third party keyboard, because this handset is very limited on resources.

Phone is rooted, so I can do lots of things.
If you mean the Google Keyboard, yes. Go to Settings > Language and input > Google Keyboard settings > Add-on dictionaries.

Refresh if you haven't done it for a while (or at all). Then just check the languages that you want. I don't know if Serbian is there though.