The former journalist, who has himself been putting forth AAP's views in Hindi and English news channels with equal elan, moved the plea before Chief Metropolitan Magistrate Deepak Sherawat, saying Jaitely be directed to testify again, now in Hindi, as the law mandated.
He claimed that as per law, the proceedings in Delhi courts should be conducted in either English or Hindi whichever language the litigants and counsel can understand.
The court reserved the order on the pleas for October 27.
It also granted exemption to Kejriwal, AAP leader Raghav Chadha and others from personal appearance for the day after they referred to their political engagements.
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Jaitley had on August 5 charged Kejriwal with making a series of false, scandalous and defamatory allegations, with regard to the alleged controversy, claiming that it had adversely affected his reputation.
Kejriwal, Ashutosh, Chaddha, along with other AAP leaders Sajay Singh, Kumar Vishwas and Deepak Bajpai, were on March 25 put on trial in the case.
The notice was framed against the accused under section 500 (punishment for defamation) of the IPC to which they had pleaded not guilty and claimed trial.
Jaitley had filed the complaint alleging that the accused had defamed him in a controversy regarding Delhi and District Cricket Association (DDCA) which he headed for over a decade.