-48 provide written materials in the range of languages used in a particular prison. These standards are reiterated in the European rules for juvenile offenders subject to sanctions or measures. In addition, they provide for special steps to be taken to offer language courses to juveniles who are not proficient in the official language. In the case of Rooman v. Belgium, the Grand Chamber of the ECtHR found that although the ECHR did not guarantee a detainee the right to treatment in his or her own language, as regarding psychiatric treatment, the purely linguistic element could prove to be decisive as to the availability or the administration of appropriate treatment. This is why the ECtHR found a number of violations due to the lack of such treatment in the applicant’s own language.90 Specific standards: • ILO Convention N°169, articles 8, 9, 10 • United Nations Declaration on the Rights on Indigenous Peoples, articles 5, 8.1, 34, 35 • Declaration on the Rights of Persons Belonging to National or Ethnic, Religious and Linguistic Minorities • Framework Convention for Minorities, Council of Europe the Protection of National Additional readings: • Minority Rights: International Standards and Guidance for Implementation, HCDH • Annual report 2004, Special Rapporteur on the rights of indigenous peoples, E/CN.4/2004/80 • Sixth Annual Report of the Subcommittee on Prevention of Torture and other Cruel, Inhuman or Degrading Treatment or Punishment, CAT/C/50/2, 23 Apr. 2013 • Report by the United Nations Independent Expert on Minority Issues, A/HRC/22/49/Add.1, 2012 • Effective Promotion of the Declaration on the Rights of Persons Belonging to National or Ethnic, Religious and Linguistic Minorities, Special Rapporteur on minority issues, A/70/212, 30 July 2015 90. ECtHR, Rooman v. Belgium, No. 18052/11, Grand Chamber judgment of 31 January 2019.