The national broadcaster has almost completely ceased broadcasting television programmes in Irish, according to An Coimisinéir Teanga, Rónán Ó Domhnaill.
Mr Ó Domhnaill was attending a sitting of the Oireachtas Committee on the Irish Language, the Gaeltacht agus the Islands to discuss his annual report, which was published last month.
In that report, he criticised RTÉ, saying it was failing in its obligations towards the language under broadcasting legislation.
For example, in 2017, only 0.7% of RTÉ's television programme output was in Irish, he said.
When the report was published at first, RTÉ issued a statement saying it was meeting all of its obligations regarding radio, social media, online, news and the delivery of content to TG4.
But Rónán Ó Domhnaill said today that while undoubtedly the development of these sectors was valuable, they do not mitigate the duty of the national broadcaster in relation to the broadcasting of a wide comprehensive range of television programmes in Irish.
He confirmed today that RTÉ did not appeal against his findings.
RTÉ has until the 6 June to submit a report to An Coimisinéir Teanga outlining how it plans to fulfill its statutory obligations in relation to Irish going forward.
In a statement today, RTÉ said it noted the content of An Coimisinéir Teanga's report and that it would answer his concerns in the coming weeks.
