doc: directive indentation fixes on language.rst

Editing language.rst file to clarify a few items
Also correcting a few things I missed earlier
Also fix title case without hyphen to be consistent

Change-Id: I463d1cdb436957a14af6ea40933f892a51b161aa
Signed-off-by: L.S. Cook <leonax.cook@intel.com>
1 file changed