Welcome Stephang to WW.
If its exactly the same content but only in different languages I would recommend using one domain.
Why not use domain.com rather than domainA and domainB? Is A and B the language listed in your domain? If so, remember the shorter the better so use domain rather than i.e. domainEnglish and domainFrench.com
It will also save you the 10$/yr registration fee + $10 privacy fee. Believe it or not, it adds up! I had many domains example.com, example.net, example.org, examples.com and finally realized
its not how big your company or website is, its the profit that matters.
So if you can lower your cost by even a dollar, keeping your revenue the same, do it.
Ask yourself, whats the point [advantage] of having two seperate domains vs combining the content all in one?
Just my 2 cents and of course I dont know your particular case but here you go:
I once had around 50 domains and finally realized I bought the names to just say I own it and felt good about owning the names, until I realized Im paying over $1000 dollars just on names. How good can you really feel spending over 1000 bucks on domains that you havent or dont plan to ever use?!? So I got rid of most of them now, and moved most of my active sites to different folders such as
so now instead of worrying on how to make an extra $500 bucks/yr, I automatically save that much! :)