There is no reason to ban what language the CDC uses or doesn't use. We have already realized a regulatory cost from a ban that is unnecessary. The CDC is required to reword their request for funding instead of continuing their work.
I will work to make sure that this sort of thing doesn't happen. If President Trump is still in office in 2018, however, I will recommend that all agencies use short words that he can understand.
Obligatory face-palm -->