If the file comes in a ZIP format, extract it to your desktop. Installation: Windows: Right-click the .ttf file and select Install .

: Offers a curated list of recommended fonts for Assamese and Bengali language pedagogy. Installation Guide

If you are looking for modern, web-compatible fonts that follow international standards (Unicode), consider:

Because Rohini is open-source, many "free font" websites host outdated or corrupted versions.