Install SiyamRupali font for svg file rendering. According to this, We have three font for bengali svg file rendering: Mitra Mono, Mukti Narrow, Lohit Bengali. "Mitra Mono" and "Mukti Narrow" doesn't render bengali conjunct properly, we never used those two. The only used font is Lohit bengali, but it doesn't much clear. doesn't looks good as siyam rupali.
Siyam Rupali is much clear, superior, beautiful font. fits in relatively small spaces. This is also most used and default font of Bengali (T35599) and Bishnupriya Manipuri (T39863) Wikipedia. It would be great if we add this font for bengali for svg rendering.