Add a link to lexicon documentation on Speechoid usage page, i.e. https://wikispeech-tts-dev.wmflabs.org/. Also, the links on https://wikispeech-tts-dev.wmflabs.org/lexserver/lexicon/ assumes that the lexicon lives on https://wikispeech-tts-dev.wmflabs.org/lexicon/. This is probably where it should go since lexserver is not really relevant to the user.
Technically I think all it would require is to remove the lexserver on line 793. However lexicon isn't the only subservice of lexserver. E.g. https://wikispeech-tts-dev.wmflabs.org/lexserver/admin/ would make a lot less sense to have at https://wikispeech-tts-dev.wmflabs.org/admin/ since it is not an admin interface for Speechoid itself.
I therefore think that part of the issue is about repairing the links. I filed https://github.com/stts-se/pronlex/issues/56 for this (since it's easier to reference code that way)