^ Why can't the "English spelling" just go along with the actual name, as it does with Brasilia, Sao Paulo, Paramaribo, etc.- What is this obsession with anglicizing everything possible? - By adding the unnecessary "s" to the town's name, Americans especially, are apt to mispronounce it and cause confusion with "La Marseillaise" (the French National Anthem), in which the "s" is pronounced.
Because the speakers, not some higher authority, determines how the English language functions, and they apparently chose Marseilles as acceptable. Either way, I don't see how it changes anything in regards to how similar it is to Marseillaise.
It's hardly just English spelling that does this. London is spelled as Londres in French. Britain is Inglistan in Persian. There are countless other examples. It's entirely normal for languages to develop their own versions of foreign place names that get well enough established over the centuries to become the English or French or Arabic or Persian word for that particular place.
I'm not sure Daguerre "invented" photography, although he was certainly one of the fathers of it. Photography was one of those disciplines that was developed by a few individuals around the same time (e.g. Henry Fox Talbot) and Daguerre was one of those (an important one nonetheless).
Yes, this has been settled a long time ago. It's a complicated story but Niépce is clearly the inventor, while Daguerre improved it enough to present it and sell it (and it's an important fact that the two had a contract about it). At the same time, in England, William Henry Fox Talbot had created a similar process but a bit after Niépce, and he presented it a bit too late as well.
Nice quiz! But saying Diderot edited “an important” encyclopedia is an understatement, he created the first ever encyclopedia, which is commonly referred as “THE encyclopedia”