Established romanization conventions for various Amami dialects is posting a false accusation around Wikipedia I made up my own romanization scheme I have no idea why he is so confident He must realize the existence of unknown unknowns in order to stop damaging Wikipedia Maybe I need to recall Hanlon s razor but being extraordinarily stupid is almost malicious Of course it is an established linguistic convention to use and for vowels of various Amami dialects that can not be found in Standard Japanese And they correspond to kana and respectively An example available online is If you need an English source check Moriyo Shimabukuro s The Accentual History of the Japanese and Ryukyuan Languages 2007 for example Ryulong added weird spelling kamwiyaki to the article The Web is now tainted by Ryulong s use of the spelling but at the time of his edit there seem to have only two sites used the weird spelling Both sites are based on Okinawan information Obviously they are unaware of vowels Okinawan dialects does not have