How can I change the chapter numbers in Bengali numerals/words. The chapter numbers are coming in Arabic format by default, instead of specifying numeral in font option.
\documentclass[12pt]{book}
\usepackage{fontspec}
\usepackage{polyglossia}
\setmainlanguage[numerals = Bengali, changecounternumbering=true] {bengali}
\setmainfont{Bangla Akademi}
\begin{document}
\chapter{ভূমিকা}
\end{document}
The above code give the following result
I expect an output like this
অধ্যায় ১
অধ্যায় ২ ...
or like this
প্রথম অধ্যায় (=First Chapter)
দ্বিতীয় অধ্যায় (=Second Chapter)

latexbanglaon CTAN. The polyglossia package's support for Bengali is still poor/incomplete, and I remember a previous question on this site asking about how to contribute improvements and the maintainer of polyglossia wasn't responsive. – ShreevatsaR Jun 28 '17 at 18:52\renewcommand\thechapter{\bengalinumeral{chapter}}. However, It would be more "natural" if I get the output like "প্রথম অধ্যায়" – Amit Jun 28 '17 at 19:12