For example, I've heard that once you are (mostly) comfortable with your second language, the third one is even easier, because you understand how you reached (somewhat) fluency in the other. *Of course, it seems that you can never truly be fluent in another language, but that's debatable, as well. I've also heard that the younger you learn, the higher your chance to be fluent.
01] Would learning another language in your language family be considered, also, easier, or does it confuse you with what word to use for which? Example, being Spanish and learning French (or vise versa)
02] Would fluency in a language presumed harder (I guess, Russian, or Chinese?) make those that are easier (Spanish, in my opinion), well, even more easier? Or is going to be hard, either way?
To me, it seems like it would be easier, but those that are similar are hard to distinguish. Like when I had a high school course in French, and then one in Spanish, I forgot half of the French, but some words were inscribed into my skull. When I think of the verb "to have", it's always "avoir"(F.) that pops up first. Then "tener"(S.) (which took some digging).
I also was thinking that it would be easier in some sense, because I was learning Japanese at first, but then I was able to take that French class which seemed like the easiest thing in the world because we shared alphabets XD (save those accents)
But what do you think?