Rajasthan is one of the larger Indian states and distances are long, making planes a fairly good option for getting in. Jaipur, Jodhpur and Udaipur all have airports with direct links to many major cities, though if coming from a smaller city, one has to go via Delhi.
Most people speak Rajasthani, Hindi and sometimes broken English. In tourist places like Jaipur and Jodhpur, you will find trained English and French guides too. You may not be able to understand some people due to Rajasthani language that they speak and at times, they may add words from Rajasthani language while speaking Hindi. This does not mean that they are unable to understand you. In Rajasthan, Hindi (with more Sanskrit origin words) is understood whereas English is spoken among the educated. Bear in mind that Rajasthani languages are more likely to be spoken by older people rather than younger people.
Rajasthan is a state in the northwest of India. It is mainly arid and its western border is adjacent to Pakistan. The main attraction for travellers is the vast Thar Desert and one of the oldest mountain ranges in the world, the Aravallis. The Rajput heritage which is apparent in the forts, temples and palaces established by the Rajput Kings like Bappa Rawal, Rana Kumbha, Rana Sanga and Rana Pratap are also popular places to visit.