I have 3 apps with support for spellcheck on my new install of Linux with Gnome:
Zen (Firefox), Gnome Text Editor and LibreOffice.
They have three different amounts of dictionaries I can choose from: 19, 0 and 1.
Because of this I have to assume that they all download their own dictionaries. If I add a new word to the dictionary in one app it will not work in any other app.
This is annoying! Would love to see work on shared dictionaries across all apps!
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@forteller AFAIK a standardized spell checking portal is being worked on. cc @AdrianVovk