posted by Jamie .
what could be some reasons to why abstract language is used?
One reason is that the concept that is being dealt with is abstract. They cannot be sensed directly as can apples, grasshoppers and bricks. Concepts like freedom, evil, beauty, truth and love are abstract.
I hope this helps. Thanks for asking.
In addition to PsyDAG's comments, another reason to shift to abstract language is to abscondite or to address the issues in a obtuse direction. This may be to confuse, or to hide the responders interests. One finds this often in political speeches. If found it very often in intergovermental memos while working in the NATO organization.