Film conlangs generally include recordings by default, but do not generally include documentation such as reference grammars. Actor coaching, fast turnaround, grammars, and other add-ons, can nontheless be negotiated.
The conlanger will receive prominent placement in film credits.
If an NDA is required, it can be jointly negotiated, with the aid of the Language Creation Society (LCS). If the LCS becomes a party to the negotiations, it will receive prominent placement in film credits.