Why did they do it in Asterix? Because most Schoolkids in the 50s knew at least a little bit of Latin.
How can you do it 60 years later? By hanging out in your everyday life with people who know at least a little bit of Latin.
Which nowadays means a few secondary schools in the US, a lot more secondary schools in Italy, somewhere with a critical mass of really old Catholic clerics (these days, that means the Vatican), or a Classics department in a university.
Sed noli me amicum facere hic in Quora ut quotidie latine loquemus. Latinae enim linguae cognoscentia mea paucissima est.
Res ipsa loquitur.