Seems like the bundled version of the Danish dictionary is from 2012 (version 2.1). Could you update it to the newest version (2.4), found in the extensions repository: https://extensions.libreoffice.org/extensions/stavekontrolden-danish-dictionary
Thanks in advance!
Andras: thought you might be interested in this one.
I guess this can be confirmed for starters.
Someone could also update the Portuguese speller since the latest is from 2017 and the one shipped with LO is from 2016.