Voulez Vous?
The lingua franca of porn has to be English. Due to the overwhelmingly US bias of pornography, even that produced elsewhere tends to be promoted in English and appear on sites that are either wholly in English or navigable by an English speaker.
It’s rare to find exclusively non-English porn sites. This is partly due to laws in much of the world prohibiting the production, distribution, storage and viewing of porn but for the most part is because the Internet started in the US and the US pornographers were early adopters.
It’s therefore common for non-English speakers to be able to understand English, especially US English, sexual slang but not the other way round.
Take Félix Faure his infamous “pompe funèbre” is legendary. Never heard about it? Well he was French president 1895 to 1899 and died (if the scurrilous rumours are to be believed) in his office receiving a blowjob from his secretary Marguerite Steinheil. In French the verb “pompe” means both “to pump” and to give oral sex to a man therefore “funeral pump”.
Tres Bien
I think that Sir Tim Berners – lee might disagree with you about the origins of the internet
He is generally credited as the “inventor”
The Internet was invented in the US, originally the ARPANET a military and academic project under the US government’s DARPA division. What Berners-Lee and his co-workers at CERN did was conceive and construct the World Wide Web based around HTTP and HTML. The WWW uses the Internet as a transport medium but the Internet itself was shuffling all sorts of information including porn around for the first 20 years of its life. In the early 1990s, when the first web servers went online the world was given the Web, a way that anyone can present and consume all sorts of information – including the naughty bits 😉