[Feature Request] Generate files in dictionary formats

It would be great if we can generate dictionary files which can be used in some dictionary software like dictd and Aard 2.

Although we already have moedict on several platform, we still need DICT. Because DICT is a dedicated protocol for dictionary, it widely used and works more efficiently.
I think this could make it possible to include this dictionary in some Linux distro in the future.

Some information about dictionary formats mentioned in FreeDict wiki:
https://github.com/freedict/fd-dictionaries/wiki/Dictionary-Formats

Maybe generate *.tei or dict-revised.{dict,index} from *.xls? then it should be easy to convert to other dictionary formats.
Or should we just convert the dict-revised.json to *.tei or even txt?
What's the pros and cons?

I don't have any experience with TEI nor DICT format yet.
The easiest approach could be just convert dict-revised.json to dict.txt which has the same format as F.O.L.D.O.C. (read the manpage of dictfmt , the -f parameter was written for that). It should "just works", but seems not a good approach.

Start by reading the existing processing path for dict-revised.json and checking how source *.xls data is handled. Compare the TEI, DICT, and dict.txt options with the dictfmt manpage; done means selecting and documenting a supported output format and generating files usable by dictd or Aard 2.