This atom plugin highlights the syntax and spell mistakes in your editor.
There is 2 modules implemented:
If you use a local languagetool server (see here to install your own), you can give in option a command line that will be executed when the package is activated to try to start the server.
You can add in package option Language Tool Stop Server Command a command that shut down the server when the package is disabled.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.