Writing in Tamil(தமிழ் ) Latex

Question

Right now, I have been sketching out my thesis. According to our university rules, we have to keep Tamil version of synopsis in our thesis. I have been using Texmaker (LualaTEX). Can someone guide me how to invoke Tamil language in a particular section without disturbing other section contents.

Answer 1

"Akshar Unicode" is the font that helped me to being tamil output beautifully.

Source file

\documentclass{article}
%Always start xelatex files with these in preamble. This helps in defining the script and fonts
\usepackage{fontspec}
%Set the main languge next as main font.
\setmainfont[Script=Devanagari]{Lohit Hindi}

%Set rest of the languages l;ike this. Experiment a bit. script=punjabi did not work. Replaced with gurmukhi and it works.

\newfontfamily{\tam}[Script=Tamil]{Akshar Unicode}
\newfontfamily{\tel}[Script=Telugu]{Akshar Unicode}
\newfontfamily{\kan}[Script=Kannada]{Mallige}
\newfontfamily{\Guja}[Script=Gujarati]{Lohit Gujarati}
\newfontfamily{\ben}[Script=Bengali]{Lohit Bengali}
\newfontfamily{\Punj}[Script=Gurmukhi]{Lohit Punjabi}

%English does not need any script specifiction! Just define the font.
\newfontfamily{\eng}{Arial}
\begin{document}
%No need to define script as this is the manin font set. Like defalut.
नमो पकवते नारायणाय! \\
%Switch language like this. { begins the changed line. \xxx denotes the switched  language. Use the same definition as denoted in preamble. } will end the switch and default to main unless again specified.
{\tel నమో పకవతే నారాయణాయ!}\\
{\kan ನಮೋ ಪಕವತೇ ನಾರಾಯಣಾಯ
}\\
{\Guja નમો પકવતે નારાયણાય!}\\
{\Punj ਨਮੋ ਪਕਵਤੇ ਨਾਰਾਯਣਾਯ!}\\
{\ben নমো পকবতে নারায়ণায়!}\\
{\tam நமோ பகவதே நாராயணாய!}\\

{\eng namo bhagavate naraayanaaya}\\
%the next line does not begin liekt he ones above. so it defaults to mainfont which is devanagari.
शुभम।
\end{document}

Output:

Wrote about the same here too

https://goinggnu.wordpress.com/2013/06/10/indian-languages-in-latex/