CHAPTER II — PROTECTION OF FUNDAMENTAL RIGHTS AND FREEDOMS OF THE INDIVIDUAL
5. Protection of right to personal liberty
(2) Any person who is arrested or detained shall be informed as soon as reasonably practicable, in a language that he understands, of the reasons for his arrest or detention.
Language
Rights during investigation - access to interpreter and translation if questioned in other language
Rights during investigation - informed of belief that crime has been committed
EDIT.