Note however that that does not guarantee that the font package will be
included on the first CD as CDs are relatively small and there are a lot
of packages that have a lot higher priority for getting on the first CD
than language-specific packages. There are more languages that have this
issue.
It will certainly be included on the first DVD and will also be installed
if you use both a CD and a network mirror during installation.
And there is of course also the option of creating a custom CD image for
your language which does have the packages for Malayam on the first CD.