I downloaded the Noto Sans Devanagari and the Noto Serif Devanagari though nothing has changed. Devanagari is the Bengali aŭ Hindi script...
I do not think it is a font problem, because in notepad, in word, in excell I can enter Bengali script with Arial...
This is what I have typed in the text box with arial :
"(fakte Rabindranath Thakur; bengale রবীন্দ্রনাথ ঠাকুর)"
What I get on the screen after I close the text box is just squares for the bengali text... and it doesn't make any difference if I change the font of the Devanagari script to Noto Sans Devanagari or if I leave it at Arial :
The same is true in the generated pdf.
I have no problem so far with greek, arabic etc... But the Georgian, Chinese, Japanese, Bengali and may be others do not work...