

Duo is not going to make anyone fluent. No single program or method will. It also isn’t, for most people, something that will make you educated in a language in a day or a week or a year, or probably ten. Nothing short of total immersial will do that.
That’s just patently untrue. School systems in most non-English speaking countries spit out fluent English speakers after a time investment of fewer than 4hrs/week, for a maximum of 8-9 years.

LMAO, I might have missed the six fingers, mainly because my eyes went directly to the map with everything from France, Belgium, Germany,… simply labeled “Russland” (Russia).