General Part
FIRST SECTION
Main Provisions
Chapter II
Purposes and basic principles of criminal proceedings
Article 26. The language used in criminal proceedings
26.1. Criminal proceedings in the courts of the Azerbaijan Republic shall be conducted in the official language of the Azerbaijan Republic or in the language of the majority of the population in the relevant area.
26.2. In the event that the parties do not know the language used in court, the judicial authority shall guarantee the following rights to them :
26.2.1. their right to use their mother tongue ;
26.2.2. the right to use the services of an interpreter free of charge during the investigation and court hearings, to be fully familiar with all documents relating to the case and criminal prosecution and to use their mother tongue in court.
26.3. The rights of parties who do not know the language used in criminal proceedings, as provided for under Article 26.2.2 of this Code, shall be secured at the expense of the budget of the Azerbaijan Republic.
26.4. The judicial authority shall provide the relevant persons with the necessary documents in the language used during the trial.
Language
Fair trial standards
Rights during investigation - access to interpreter and translation if questioned in other language
Rights during trial - interpretation and translation
EDIT.