Question

in which language early jains taught their doctrine​

Answer 1

Answer:

Practically all the known texts in the Apabhramsha language are Jain works. The oldest Jain literature is in Shauraseni and the Jain Prakrit (the Jain Agamas, Agama-Tulya, the Siddhanta texts, etc.).

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Answer 2

Answer:

the oldest jain literature is shouraseni and jain prakrit.

Explanation:

From the 12th century, various regional languages emerged in North India: variants of Gujarati and Hindi are used by the jains then.