Hoi,
When you want to read Wikipedia off line, you can when having a user interface in English is not a problem. You are also in luck when you use the software that is developed for Malayalam. The Wikimedia Foundation is supporting new functionality that uses the openZIM format and, this will allow you to make selections that can be used off-line.

Okawix will likely be the first application that supports openZIM and can be localised at translatewiki.net. They told me that once they are ready with supporting the Android and iPhone smart phones, they will work on supporting openZIM. In the mean time, their software can be localised at translatewiki.net and you can download the data in your language as well.

I am really interested to learn if Okawix works well for your language. There are two parts to it:
If there is something amiss with the language support of the software, then you can help us by improving the localisation of Okawix.
Thanks,
     GerardM

http://ultimategerardm.blogspot.com/2011/03/test-offline-wikipedia-on-your-android.html