ISM fonts carry a legacy of Malayalam computing. While the world is moving towards Unicode for better compatibility across devices, ISM fonts like Revathi and Karthika still hold a special place in design and official documentation.
Installing the fonts is only half the equation. To type in Malayalam using ISM, you need to have the ISM software installed and configured correctly. ism malayalam fonts zip
The instructions state:
A highly legible font frequently utilized for official documentation and book publishing. ISM fonts carry a legacy of Malayalam computing
You can use free online converters:
Which you are using (Windows 11, older Windows, or macOS)? ism malayalam fonts zip