Chapter IV
Fundamental Rights
35. (3) Any person who is arrested or detained shall be informed in writing within twenty-four hours (and in a language that he understands) of the facts and grounds for his arrest or detention.
Language
Rights during investigation - access to interpreter and translation if questioned in other language
Rights during investigation - arbitrary arrest or detention and deprivation of liberty
Rights during investigation - informed of belief that crime has been committed
EDIT.