Why is Hindi the official language of Rajasthan even though Marwadi is the most spoken language?

 It is a good question, but need to be asked to your state politicians.

Not only Rajasthani, the following are the Indian languages affected by introducing Hindi.

Bhojpuri,

Rajasthani,

Chattisghari,

Magadh,

Haryanvi,

Khotta,

Marwari,

Bhundeli,

Malvi,

Sadan.

Mewari,

Awadhi,

Lambari,

Pahari,

Hara,

Bhageli,

Garwarli,

Nimadi,

Surjapuri,

Kumaoni,

Surghujia,

Banjari,

Dhundari,

Brajbhasa,

Gojri,

Kangri.