>>12284135I'm not English, I'm French.
Had to learn Spanish, English which I now fully grasp.
And delved profoundly into Arabic, and now I'm doing the same with German so I am speaking from my experience.
Immersion is best, but memorization is essential. Memorization is good because most languages are alien to each another.
Romance languages learning is easier once you know one, learning Dutch is easy once you are English, learning German is more alien because of the structure, Russian is impossible without memorization.
Learning Japanese/Chinese/Korean needs a lot, lot of memorization either because of the logograms or new words. You can go to China with 0 knowledge and experience the language and learn, but it will take you decades, which memorization speeds up to mere years.