https://webcdn.guangming.com.my/wp-content/uploads/2022/08/i...
One of the ways to learn a smattering of a language would be to look at YouTube comments; sentences of the form "in YYYY they still made real music" and "is anyone watching in YYYY?" seem to occur in every natural language.
(for Sekigahara I wonder if part of the issue was credibility: if Tokugawa promises so many koku, you can be pretty sure you're getting them [and in the event he even lasted into his 70s] but if Ishida promises you so many koku, well, a lot can happen in 7-8 years: what are the chances that young Toyotomi will honour Ishida's old deals?)
Edit: come to think of it, both Shu and Wu do spend many of their waking hours trying to figure out how to intermediate themselves into any possible otherwise-dyadic transaction... Wei supposedly does as well, but compared with Shu and Wu, at least here, Wei has a light touch.
more evidence in favor of PH's hypo: I'm bouncing off the 粤剧 :(