Python path option is for users install multiple Python versions. Python is required for creating Word Wise and X-Ray files, it's not an optional dependency.
New release v3.31.4 changes the language options to "Definition language" and "Book language". Users only need to choose the Word Wise definition language. Book language is for viewing the lemma data, it's not a savable setting.
For more information, please read the document:
https://xxyzz.github.io/WordDumb/