Hello,
When I asked those questions, I was a beginner. Now, I have tested both solutions, and I better understand.
Thanks to everybody for all the informations provided, and I will give you my feedback now:
I use... both Apollo modules AND Locopon solution !!
One for localising my menu and contents of certain module (HTML, survey, announcement, FAQ, Links), the other one to hide other non licalised module based on locale selected (I have two similar module, one for each language, and one is hidden/displayed depending of the locale selected).
The combination of the two methods give EXCELLENT results, I am very satisfied. Thanks to both of you.
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PS: Do not take my current website as an example, it is not using it correctly for the moment, I am still working on the dev... The prod will be soon available and fully localised !! Hehehe