I only know a tiny corner of the language, but for things like this I really wish they'd cite the original Japanese. Precisely because the haiku is a constrained form, it is also an opportunity for ambiguity, double-meaning, and cases where a word may be translated with the same semantics but different connotations.
By comparison, the gold standard for dealing with non-English poetry in English: https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1...
You have (1) the original Greek, (2) word-by-word lookup, (3) translation notes, and (4) multiple translations.