Hello, for both Aspell 0.50 and 0.60, links in the Dictionaries table (https://ftp.gnu.org/gnu/aspell/dict/0index.html) lead to a Polish dictionary from 2006, but the current version is 20200727. An update would be nice.
Additionally, instead of a file, perhaps a link to the webpage (https://sjp.pl/slownik/en/) could be a better option? S. U.