I kinda think it should keep using the side from the host language.

@upsuper when you say 'host' language, do you mean:

1. use the side that is normal for the language which has emphasis marks? ie. different for embedded ja text than for surrounding zh text.
2. use the side that is normal for the surrounding language? ie. the same for embedded ja text as for surrounding zh text.

(I suspect you mean 1 but wanted to be sure.)

@r12a I have no good example pic for this now, but in practice, I think most house style use 2, which means, if the host/main text is Chinese, the punctuation system including the emphasis marks should be Chinese-style, even some foreign (e.g. Japanese) words mix in. and vice versa.

(Sorry that I somehow forgot to reply.)

I mean 2, that the side of emphasis marks is chosen according to the surrounding language rather than the embedded text.

I agree with @ryukeikun and @upsuper.

Ok, great. Thanks, guys. Looks like we have a conclusion here. I guess it would be good to add a line to clreq, but i'll also try to feed back into the original CSS issue.