How to write Odia in LaTeX?

Question

I want to write an article in Odia language. Some kind people in the TeX chat room helped me. Now I'm using this:

\documentclass[12pt]{amsart}
\usepackage{fontspec}
\setmainfont[
  Renderer=HarfBuzz,Script=Oriya,
  BoldFeatures={RawFeature={axis={wght=600}}},
  BoldFont=*
]{NotoSansOriya-VariableFont_wdth,wght.ttf}
\begin{document}
"ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ |"\\
{\bfseries
"ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ|"}\\
"My name is Kalia, No one is like me."

$$a^2+b^2=c^2, କ^2+b^୨ =c^2$$
\end{document}

And this gives To write my article I only need to know how to change the font typeface of English text of entire document.

Though this is not that necessary for my article, But I am curious to see how to

1. write Odia letters in italics
2. use Odia letters in math-mode.

I tried but Odia letters doesn't appear in math-mode. In the image see that the letter 'କ' is not appearing in math-mode but the number '୨' appears.

Lastly, Is there any other way to write Odia in LaTeX?

Thank you.

PNDas

Answer 1

You can use different fonts for different scripts so use real italic for Latin and no italic (or fake slant) for Odia

\documentclass[12pt]{amsart}
\usepackage{unicode-math}
\setmainfont{Noto Sans}
\newfontfamily\odia[
  Renderer=HarfBuzz,Script=Oriya,
  BoldFeatures={RawFeature={axis={wght=600}}},
  BoldFont=*
]{NotoSansOriya-VariableFont_wdth,wght.ttf}
\begin{document}
{\odia"ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ |"}

{\odia\bfseries
"ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ|"}

``My name is Kalia, No one is like me.''

{\itshape ``My name is Kalia, No one is like me.''}

{\bfseries ``My name is Kalia, No one is like me.''}

\[a^2+b^2=c^2, \text{\odia କ}^2+b^{\text{\odia ୨}} =c^2\]

\end{document}

In comments you said you wanted to keep latin modern, so do not change the main font and use thiner Odia fonts as the default weight is too heavy alongside LM

\documentclass[12pt]{amsart}
\usepackage{unicode-math}
%\setmainfont{Noto Sans}
\newfontfamily\odia[
  Renderer=HarfBuzz,Script=Oriya,
  RawFeature={axis={wght=300}},
  BoldFeatures={RawFeature={axis={wght=500}}},
  BoldFont=*
]{NotoSansOriya-VariableFont_wdth,wght.ttf}
\begin{document}
{\odia"ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ |"}

{\odia\bfseries
"ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ|"}

``My name is Kalia, No one is like me.''

{\itshape ``My name is Kalia, No one is like me.''}

{\bfseries ``My name is Kalia, No one is like me.''}

\[a^2+b^2=c^2, \text{\odia କ}^2+b^{\text{\odia ୨}} =c^2\]

\end{document}

Answer 2

As to the text fonts, here is an example with babel showing how to switch the font with the script (and the hyphenation rules, too). Actually, this example can serve as a model for other Indic languages, including Assamese, Gujarati, Hindi, Kannada, Malayalam, Tamil, etc. I presume you actually want a danda instead of a vertical bar, so I’ve replaced it. I’ve added some explanations as comments.

Note, however, you will find always ambiguous situations requiring explicit markup, as the quotes reveal in this example. No universal rules can be settled and depends largely on the document.

\documentclass[a4paper]{article}

\usepackage{babel}

% In versions >=3.79 the preferred name is odia. In previous versions
% use oriya. Although languages are usually passed as options to babel,
% in this case I’ll use \babelprovide to activate a useful transform,
% which prevents a break before a danda if preceded by a space.

\babelprovide[
  import, main,
  % mapdigits, % Optional: replace Arabic digits by Odia ones
  transforms = danda.nobreak]{odia}

% Tell babel to switch the font and hyphenation when a char
% of the script for English (ie, the Latin script) is found.

\babelprovide[onchar = ids fonts]{english}

% By default, digits and puntuation are considered part of the Latin
% script. Very likely that’s wrong and have to be fixed in babel, but
% fortunately there is a workaround:

\babelcharproperty{`\!}[`\@]{locale}{odia}
\babelcharproperty{`\[}[`\`]{locale}{odia}
\babelcharproperty{`\{}[`\}]{locale}{odia}

% Set the main roman font, for the main language. 'Script' and
% 'Language' are set by babel. You may find a nasty and somewhat
% misleading warning about language and/or script not found raised by
% fontspec - just ignore it (it will be concealed altogether in babel
% 3.81):

\babelfont{rm}
  [Renderer=HarfBuzz,
   BoldFeatures={RawFeature={axis={wght=600}}},
   BoldFont=*
  ]{NotoSansOriya-VariableFont_wdth,wght.ttf}

% Set the font for english:

\babelfont[english]{rm}{Latin Modern Roman}

\begin{document}

ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ ।

``My name is Kalia, No one is like me.'' 

\textit{``My name is Kalia, No one is like me.''}

\textbf{``My name is Kalia, No one is like me.''}

\textbf{ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ ।}

\end{document}

Answer 3

Welcome to TeX.SX! The font you choose does not come with italics, so you may want to choose a font that actually provides italic letters (given that such a typographic feature even exists in this script). It may not be too appealing typographically, but if you still want to stick with NotoSans Oriya, you can use the AutoFakeSlant option provided by fontspec which will fake italics by slanting the glyphs.

As for the use in math mode, you may want to wrap the letters in a \text macro which will typeset the non-italic style of the relevant glyph.

\documentclass[12pt]{amsart}
\usepackage{fontspec}
\setmainfont[
  Renderer=HarfBuzz,
  Script=Oriya,
  BoldFeatures={RawFeature={axis={wght=600}}},
  BoldFont=*,
  AutoFakeSlant=0.2
]{NotoSansOriya-VariableFont_wdth,wght.ttf}

\begin{document}
``ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ |''

{\bfseries
``ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ|''}

``My name is Kalia, No one is like me.''

{\itshape
``ନାଆଁଟି ମୋର କାଳିଆ, କେହି ନାହିଁ ମୋ ଭଳିଆ|''}

\[a^2+b^2=c^2, \text{କ}^2+b^\text{୨} =c^2\]
\end{document}