CHAPTER 2. LEGAL STATUS AND RIGHTS OF ARRESTEES AND DETAINEES, AND GUARANTEES OF PROTECTION OF THESE RIGHTS
Article 13. Rights of Arrestees and Detainees
1) to receive information in his/her mother tongue or other language he/she is fluent in about his/her rights, freedoms and responsibilities;
Rights during investigation - access to interpreter and translation if questioned in other language
EDIT.