See thread titled "Help with Tamil (Indic) font (Emacs from bzr)" on
emacs-devel.

Relevant posts from the above thread:

1. http://lists.gnu.org/archive/html/emacs-devel/2013-01/msg00375.html
2. http://lists.gnu.org/archive/html/emacs-devel/2013-01/msg00379.html

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