What was the purpose of Das Ganu's book, the 'Ishavasya-Bhavartha-Bodhini,' and what language was he using to write it?

The purpose and language of Das Ganu's work are clearly outlined in Chapter 20 of the Shri Sai Satcharitra. His primary motivation for writing the "Ishavasya-Bhavartha-Bodhini" was to create a commentary on the Ishavasya Upanishad for people who were "ignorant of the Sanskrit language." He wanted to elaborate on the meaning of each word to make the scripture's profound wisdom accessible to a wider audience. To achieve this, Chapter 20 specifies that Ganudas began his work using "simple Prakrit language as a means," compiling his explanation into Ovi verses to make it more understandable.