It should be possible to give some information as URL parameters, to have those fields filled out automatically.
If we end up using the special page for editing lexicon entries, it will be used there. It is also required for T133857: Link to Special:EditLexicon from player.
Parameter candidates:
- the word itself
- the page from which you got here
- language (required if no source_page)
- the sentence in which to word appears?