In which specific language are the canonical texts, such as the Tipitaka of Theravada Buddhism, maintained?

The canonical texts of Theravada Buddhism, such as the Tipitaka, are preserved in the Pali language.

Hindi is a modern language and postdates these ancient texts.

Sanskrit was used more for Mahayana Buddhist and Brahmanical texts than for the Theravada canon.

Ardhamagadhi was the language of the Jain Agamas, not the Buddhist Tipitaka.

The Tipitaka consists of the Vinaya, Sutta and Abhidhamma Pitakas.

Theravada means 'the doctrine of the elders'.