[peyton]

N1? You mastered 敬語 in 6 months?

[marci]

I think they meant for the past x years, they've been spending half of it in Sweden, the other half in JApan, in chunks of 6 months.

edit: and you can be fluent in one or more languages without knowing how to read/write them.

[FredPret]

I think he spent half a year every year