A
Hungarian research project has extracted Wiktionary entries for 40 languages; the word lists in the
Wiktionary folder are perfect for use with
tab2opf.py or the binaries available at
this site.
You can also convert these files to StarDict dictionaries with
PyGlossary.
(The files names are based on
ISO codes. For example, da_oc.txt = Danish-Occitan.)