And the MS Word plugin as a plugin only available for a charge is also not clear:
Colour choices also seem questionable, given their usual association. I would prefer a neutral choice of colours that doesn’t look like a movements banner. But this issue has been raised before.
Yes. Also, I suggest that you fully separate LanguageTool and LanguageTool Plus. Put all the pricing and comparisons on the commercial page (languagetoolplus.com). On languagetool.org, tell people that they can get many more features with languagetoolplus.com.