The language of the court is usually the same as the official language of the country the court is located in. In the United States, the official language is English, and the Civil Rights Act (in Title VI) provides for State Courts funded by federal monies to provide interpreters for defendants who are not proficient in English. Depending on court rules, the interpreters may need to be certified, or otherwise credentialed.
English Language
The court language during the reign of Akbar was Persian. Akbar promoted Persian as the official language of his court and administration due to its widespread acceptance and use in diplomacy, literature, and administration in the Mughal Empire.
Persian
Gujarat High Court ,,
Turkish
The royal court typically spoke the language of the ruling class or the official language of the country. For example, in medieval England, they would have spoken Middle English, while in France, they would have spoken French.
Most of the court Chronicles are written in Persianand Turkish because of these reasons:-- a) Persian was recognised as the official court language . b) Persian language was used for higher administrative purposes. c) Large number of immigrants who came from Central Asia through spoke Turkic language, but Persian was considered to be an official language.
The proceedings of the Supreme Court are conducted in English only. http://www.supremecourtofindia.nic.in/history.htm
South Africa has 11 official languages and all these languages are allowed in court proceedings. However, the main language spoken is English.
The Magna Carta was written in Latin as this was the main language in the Church and the Court of England at the time.
I'm going to go with you want to know what the official court language was following the Norman Invasion in 1066 and the time when English became the language in use, in which case it was French.
Captain Jack Sparrow talked of the impending danger in a foreign language at the meeting of the Brethren Court in At World's End.