Quote about wild strawberries

The original title, "Smultronstället", refers to a Swedish phrase meaning something like "secret garden", i.e. a secret place where one can relax and enjoy life.

The title is connected the the old house of Professor Borg, where his cousin is picking wild strawberries.

Regarding your question about the quote, I believe that in the scene where his cousin (Sara?)is picking wild strawberries and arguing with Sigfried she mentions "Smultronställe(t)".

The "title drop" is 19m into the movie.

Just before Isak enters his first dream, when he and his stepdaughter make a stop to visit the house of his childhood, Marianne goes for a swim and Isak takes a good look around and says with a big smile: "Smultronstället!".

The English subtitles say : "The place where wild strawberries grow!"

Like the other user said, there's a double meaning here because it's also a Swedish expression.