I don't think this is news, but it is worth looking at.
Products can be saved to a different language than is shown
I have a website with danish and swedish languages.
steps:
1: open a product in swedish
2: then open the same website in a different tab
3: change the language to danish in this new tab
4: go back to the product tab, and change the text, and click save.
Now the danish version has the text entered in step 4, and the swedish version is not updated.
I see similar behaviour in Ecommerce and PIM.
This is not acceptable behaviour, and it is REALLY hard to track down :-)
DW 9.6.10, but I'm almost certain that this is a general problem across versions.
/Jonas