Opinion 112 denies the request to placeSeliberia Aristovskaya and Parinkina 1963 (Approved Lists 1980) on the list of rejected names because the information provided is insufficient. For the same reason, Opinion 113 denies the request to rejectShewanella irciniae Leeet al. 2006 and Opinion 114 denies the request to reject the nameEnterobacter siamensis Khunthongpanet al. 2014. Opinion 115 rejects the epithet ofMoorella thermoautotrophica (Wiegelet al. 1981) Collinset al. 1994, which is regarded as anomen confusum. To assess the consequences of Rule 8, Opinion 116 revisits names of taxa above the rank of genus which should comprise the stem of the name of a nomenclatural type and a category-specific ending but fail to do so. Such names should be orthographically corrected if the sole error is the inadvertent usage of an incorrect stem or be regarded as illegitimate if otherwise. The necessary corrections are made for a number of names. In Opinion 117, the request to designateMethylothermus subterraneus Hirayamaet al. 2011 as the type species of the genusMethylothermus is denied because an equivalent action compatible with the Code was already conducted. In Opinion 118, the possible orthographical correction of the nameFlaviaesturariibacter is treated, as are the analogous cases ofFredinandcohnia andHydrogeniiclostidium. The genus names are corrected toFlaviaestuariibacter,Ferdinandcohnia andHydrogeniiclostridium, respectively. Opinion 119 concludes that assigningActinomycetales Buchanan 1917 (Approved Lists 1980) as nomenclatural type of the classActinobacteria Stackebrandtet al. 1997 would not render that name legitimate if Rule 8 remained retroactive. The request is granted butActinomycetales is also assigned as type ofActinomycetes Krassilnikov 1949 (Approved Lists 1980). In Opinion 120, the possible orthographical correction of the nameAmycolatopsis albidoflavus is treated. It is grammatically corrected toAmycolatopsis albidoflava. Six names which could according to Rule 61 be grammatically corrected by anyone are also corrected. Opinion 121 denies the request to revise Opinion 69 and notes that Opinion 69 does not have the undesirable consequences emphasized in the request. In Opinion 122, the request to reject various taxon names ofMollicutes proposed in 2018 is denied because it is based on misinterpretations of the Code, which are clarified. Alternative ways to solve the perceived problems are outlined. These Opinions were ratified by the voting members of the International Committee on Systematics of Prokaryotes.