I’ve been trying to find a movie that I watched last year, and can only vividly remember one scene…
A couple visits an idyllic countryside picnic spot next to water where the woman goes swimming, they revisit the same place later in the film too. The only thing I’ve been able to manifest are two pictures (one below)
that aren’t from the movie but are pretty much the exact angle, scene, vibe from the movie.
So it was English spoken, not subtitled for English speaking viewers? I know of a French movie, the beginning a couple go swimming… the woman swimming disappears …and right at the end of the movie the couple meet again at the same spot, sounds a little like what you describe… but it is not in English.