Some of my edits have been motivated by looking at extracted Wiktionary data for inconsistencies, but I am in general interested in a large number of languages, recently mostly Czech.
Additionally I am using the Wiktionary data (mostly extracted by the great Wiktextract project to create open source language learning software, for example ebook reader dictionaries. I am a huge fan of other similar projects such as WordDumb.
https://github.com/Vuizur/ultimate-dictionary-api - A free dictionary API with some more features and better language support than the official one, based on wiktextract data. (I also like the Kaikki API.)