"Italians and Frenchmen are Europeans."

[beyarkay]

Is capitalisation of the first letter of a language required in Esperanto as it is in English? I ask because 'francoj' is not capitalised

[danielqsc]

Actually there are no fixed rules about capitalisation in Esperanto, though everyone always capitalises the first letter of sentences (like in English) and proper names. But there is more than one way to write some proper names, like names of languages - when they are proper names, they're commonly written capitalised (Mi parolas Esperanton), but generally they aren't capitalised when they're made from names of countries or peoples (Mi parolas la portugalan/la Portugalan). Names of peoples can be written in both ways (Mi estas Brazilano/brazilano). There's a better explanation here (written in Esperanto, but I think it'll be kind of easy to understand): http://bertilow.com/pmeg/gramatiko/propraj_nomoj/majuskloj.html

[hidethedog]

Could this be: Geitaloj kaj gefrancoj estas eŭropanoj

[gogea_oletaa]

Normally not. It's possible to understand, but italoj and francoj is gender neutral (ge- means "both sexes together"), so you don't need it and isn't used like that as far as I know. Thus, it also sounds strange.

Resource: https://www.esperanto-usa.org/posters/Affixes.pdf