Pretty sure senpai is Japanese for teacher or master.
Robinson Crusoe as you think about this piece is that the person may prepare an essay on this topic
Mandarin. As mentioned before, Mandarin is
unanimously considered the toughest
language to master in the world! Spoken by
over a billion people in the world, the language
can be extremely difficult for people whose
native languages use the Latin writing system.
Norwegian is considered one of the easiest
languages for English speakers to learn
because English has at least 5,000 loan words
from Old Norse, and shares the same word
order, grammar and syntax as Norwegian.
Sorry I can't understand it's not English