Mitochondrial peptide chain release factor that directs the termination of translation in response to the peptide chain termination codons UAA and UAG. {ECO:0000269|PubMed:17803939, ECO:0000269|PubMed:33878294, ECO:0000269|PubMed:37141370}. This is the function of MTRF1L (mitochondrial translation release factor 1 like, Ensembl gene identifier ENSG00000112031).