[quote=ImportantNobody]
Due to being a fantasy world there is no Japan, but that doesn't stop people from speaking English and having it called that when there is no England either, so her language can still be called Japanese and we can just pretend it got it's name somewhere else rather than a name of a country. There can be a nation practically like Japan in every way as a stand in. It's likely off the coast of the region this takes place in.It would be funny if the Queen is this world's stand in for an Otaku, interested in that countries media (plays and such because there's obviously no anime yet) so knows a few Japanese words. She could claim she was studying to make herself a better leader when she was just wanting to enjoy plays and slack off from real work.
[/quote]

guess it might depend on the one who wanted a samurai then for the language, cause i remembered some wanting that
IF that would end up as a no go, then perhaps japanse in this world is the language of her race, explains a bit more why she can speak it
looking at the memoryloss its kinda clear that while her humanoid memory is plain gone
her racial / instinctive memory is not, using the healing water by instinct for example, just as speaking those words by instinct

I actually like it better that wat, her japanese is her race natural language
but as said depends on the samurai person