This website uses Bangla (Bengali) Unicode system, which is becoming a standard now.
If you are not being able to see Bangla fonts properly,
here is a quick and easy solution that should work.
Click here to download a Bangla Unicode TTF font SolaimanLipi. There are many others available on the net that you can search and download. Then copy that ttf file to C:\WINDOWS\Fonts folder on your computer.
If that does not work for reason, there are plenty of help available online on this topic. A Google search on "How to download and install bangle Unicode fonts" will bring you a lot of useful links. For example, you can visit these sites:
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