Some poems were first published in South Korea in an anthology alongside the work of two other poets. This particular collection was released in 1946 (72 years ago) and the poet I am interested in translating died in 1968 (50 years ago as of May 2018).
If it only comes down to the publication, I believe it should have entered the public domain by now. If it's up to the author's death, do I need to wait until their deathday, did it enter the public domain at the beginning of this year or will it enter at the beginning of next year?
Does the fact that it was originally published alongside the work of two other poets change anything?