in addition to T195816:
Japanese is often written in latin script:
Some latin japanese strings are currently tagged with ja-x-Q53979348 (https://www.wikidata.org/wiki/Q53979348)
@Loominade Monolingual codes aren't used for Lexemes. Request is to add them for Lexemes. I'll rename the ticket.
@Amire80 @jhsoby What do you say?
@Loominade Any particular reason why P2125 (Revised Hepburn romanization) can't be added to forms as appropriate, in lieu of this language code?