nice to meet you, ranjitshiji!
for this specific issue, we well probably need to wait for jean to come back from a few days holidays.
i'm not a font specialist, but i guess that in this case you will have to focus on the font shaping and -- probably -- harfbuzz.
it might something simple, that jean can fix very fast... but if it's something that needs more work, i would be glad to help you guys better understand this part of the scribus code that is so important for you!
i have also added another screenshot to the ticket, one that better shows the issue for people like me who have no clue about your language : - )
(i was curious about the meaning of the sentence and i was a bit surprised about what google translate told me...)