Sanskrit was created. The name itself denotes that. The purpose was to have texts - not only religious but also medicine, jyodish, music etc. Since it is predominantly a written language and dosenot allow any changes.
Second though the later kings were from Andhra, Maharashtra - Lot of Pallu, Prabandam, Sindhu, Kuravanji were written with King's - Patrons support. Some even on them.
Many Thala Puranams were written with King's support