I am building a website in two languages, English and Japanese. Right now, there is an "English" version and a "Japanese" version of each page, and you can click a link to switch between the different languages (this is how most multilingual websites work).
However, a usability test revealed that many of the site's users are Japanese people who speak English reasonably well and want to see the English and Japanese content side by side like this:
ENGLISH TEXT 1 JAPANESE TEXT 1 ENGLISH TEXT 2 JAPANESE TEXT 2
But before I make the change, how do search engines index content like this (= each article is a series of alternating English and Japanese sentences)? Is this going to confuse Google and Bing, or are they sophisticated enough to handle this?
I'm worried because the English/Japanese ratio will basically be 50/50, so it seems like it might be penalized in the rankings because it is not clearly one language.