Are the titles, names, server names, skin names, etc. of all heroes in League of Legends self-created?

Yes, they are basically all created by Riot Game

But the backgrounds, models and skins of many heroes are borrowed from them

You can check it out Let’s take a look at some anecdotes about LoL heroes, including the origins of their names, skins and lines

As for the name. . . It should be original

It’s just that some of the names in the Chinese server are weird and not the same as the original ones in the American server