The previous toot was about testing LanguageTool usage on Windows. It's more tedious than on Linux or macOS as no one has provided a decent "package", but I think the process required is reasonable. I wrote down some notes here:

https://alex.corcoles.net/notes/tech/language-tool

In my opinion, LanguageTool is quite good for English, Spanish and Catalan. Plus running it yourself seems to avoid some problems.