[XeTeX] word breaking in languages like telugu, sanskrit

[Kattamuri Ekanadham]

When we compose languages like telugu, sanskrit etc. using xetex,
we would like to have a means of producing paragraphs with justification on
both sides.
Normally clank is taken as an opportunity for word-breaking; however, in
these
languages perhaps we should specify (in addition to blank) that a vowel
could signal a potential place for breaking. For instance, if the word
"sAhitya" is overflowing a line, it can broken either after "sA" or after
"sAhi" also.
Is there a way to specify this in xetex or with some latex commands?
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