When I was a kid I learned english by watching cartoons and movies with subtitles, in Portugal we have subtitles in pretty much everything except comercials.
As I grew up it was easy to learn a few words in other languages due to watching movies. This is extremely easy and I can see why other european cultures don't speak other languages more easily, all is translated to their native language so they don't have that correlation on what is being said with the meaning....
My opinion is not to listen people telling you not to put ads.
Remember, your demographics is not first tier so that advice doesn't apply... You'd be surprised what a banner or an interstitial can bring on those countries....
This brings back some memories. Used to do some experiments using POV Ray back in the day.
I remember how slow the process was, it could take several hours/days to generate an image full of reflections, but in the end the results were usually stunning...
[0] - https://siaprime.net/