I started using it last year and I think others would benefit from knowing about it too.
Offline dictionaries(based on data from wikipedia, wiktionary etc.):
https://github.com/itkach/slob/wiki/Dictionaries
I use the Wordnet and SimpleWikipedia dictionaries along with the one for the Wiktionary in my native language.
Going on a tangent about the dictionaries(you can skip this if you’re currently not interested on that):
They had a Malayalam dictionary, which was quite awesome for me, as I’m a Malayali. The dictionary is based on ml.wiktionary.org from 2021. Maybe there were not too many additions for the effort to make a new one.
The code for creating the dictionaries are also available in their github. I tried it out, but I’m on Opensuse Leap currently and installing couchdb seems tricky.
I also saw a python package, Pyglossary, which helps to convert dictionaries between opensource formats.
Wikipedia provides monthly dumps of zim files(used in Kiwix, another dictionary app. Not available in F-droid).
https://dumps.wikimedia.org/other/kiwix/zim/
I was able to use Pyglossary to convert those into slob files and use them.
So might be an easier way to get slob files, if slob files of Wiktionary or Wikipedia in your language are not available. Or if you want to update them. Data scraping is also avoided.
I’d love to use it but I think it’s too difficult to set up
The extra part is for making/updating slob files on our own.
You can directly download the app and pre-made dictionaries for it are available.
What language do you want?
You have to download the dictionary (I’d suggest both wordnet and wiktionary, they have a page with links to each type of dictionary here), put them in a specific directory, open aard2 and add them to the list of dictionaries.