SECTION III
STATE POWER
Chapter VII
JUDICIAL POWER
Article 127. Independence of judges, and fundamental principles and prerequisites of the administration of justice
X. Court proceedings in the Republic of Azerbaijan shall be conducted in the official language of the Republic of Azerbaijan or in a language of the majority of the population of the specific region. Participants in court proceedings, who do not know the language of the proceedings, have the right to be acquainted with materials of proceedings, and to take part in proceedings using an interpreter, and to make statements in the court in their native language.
Language
Rights during investigation - access to interpreter and translation if questioned in other language
Rights during trial - interpretation and translation
EDIT.