A/B testing and the whole idea of "optimizing for user growth" should be dropped from our thinking. This is business and marketing driven thinking that often leads to things like the deplorable quality of social media feeds.
Rather we should optimize for user understanding or satisfaction - whichever fits. These are harder to capture but FAR more beneficial to the consumers of content.
I did a very quick trial of this with a post I did in English. I don't speak Spanish so am not the best judge for sure but when I translated it to Spanish then back to English it was nearly flawless. Much better, in this same manner, than Google Translate.
I have three google accounts, one personal, one for my business, one for garbage web sites where I need an email but do not trust with my everyday address.
Chrome sucks at dealing with these since sync is tied to the account you have logged into and you have to switch login every time you access another account. This switch affects every new tab.
Firefox does not touch the FF login when you access some Google account info or email so FF sync works sooo much better than Chromes. Chrome needs to scrap and rethink how it uses Google accounts IMHO.
Rather we should optimize for user understanding or satisfaction - whichever fits. These are harder to capture but FAR more beneficial to the consumers of content.