First of all, you must have a main language set for your website say ENGLISH text.
Second, I developed all the pages in English Pages OK,
Third, I turn on Multi-lingual Beta and Editor X platform will generate the second languages I have chosen, for example, I selected the Chinese Simplify for Main Land China. I got all the pages translated into the Chinese Language with another set of web pages by their server machine/computer power. For cultural reasons, these translated pages in Chinese may have some error in our actual meaning in Chinese, a human translation correction is needed for I say 10%. The new language should be looked ok in the new language.
After my initial test on the release of the beta version earlier this year, I just remove it since my current Website in English is not complete especially for mobile screens. Also to buy sometime time for them to improve further.
As I had done prototype under wix.com old platform with three languages, English, Chinese, and Tamil. Tested the Editor X look similar. I am confident WIX Editor X can do it better later.
Good Luck and Keep Safe, Cheers!