Most of my clients speak to customers in both languages. The design has to feel like one brand in either script.
Pick type families that match
Look for Bangla and Latin fonts with similar weight and x-height. Test the same sentence side by side at small sizes.
Give Bangla more room
Bangla needs a taller line height — around 1.6 for body text — and no letter-spacing on headings.
Design the Bangla version first. The English version almost always fits after that.
