This is a grey area. Originally, Swaraj Graphics fonts were commercial software sold on CDs. Today, the original company is largely defunct. Thus, many DTP operators share font folders freely. However, from an ethical design standpoint:
For professional Devanagari typography, consider: swaraj graphics font
To use these fonts effectively in tools like Photoshop or Illustrator, designers often look for "Font Packs" that include multiple weights and styles. This is a grey area