Right to a fair trial. Person belonging to a linguistic and ethnic minority. Right to documents of the proceedings and oral discussion translated by an interpreter.
Art. 6 ECHR
If a person, charged with a criminal offence, understands the language of the proceedings well enough for him/her to exercise his/her right to a defence, he/she cannot insist to have an interpreter appointed. This applies even when the person belongs to an ethnic and linguistic minority.
Decisions consistent with precedent
Bideault v. France, No. 11261/84, ECommHR (Plenary), 1 October 1986