It's surprising how little you 'need' the left-hand side; it rather depends on how you learn. If you have a teacher who keeps switching languages it's hard to get immersed.
Personal memory: in 1971 when I was in Spain to learn Spanish, I was down on my luck, money running out, feeling rotten... And a dog threatened me. Back in England I had been friends with a Spanish-speaking family with a yappy dog. They were always shouting
Vete Skippy!.
Back to Spain: I shouted
Vete!, and felt much better (at the knowledge that I had reacted in a 'Spanish' way). Fortunately, at that stage, I had not been exposed to any of the cerebral antics that language learning can sometimes involve!
But I agree about finding long words easier. Back then I used to try to read the
Vanguardia every day, and found the economics and politics articles relatively easy. But anything involving short/local words (especially sports coverage) was - as we say - 'a closed book'/'all Greek to me'.
Glad you like the graphic - thanks.
b