I don't see any way of specifying a custom URL for an existing LanguageTool server, e.g., if you have the server running on your own (remote, not localhost) hardware. As far as I understand the shell code, it will use the public server if --server lt, and the localhost if it's --server my. Is it possible to specify a custom hostname? Custom port? For example, if --server is not in ["my", "lt", "stop"] to just use the argument as the server URL to specify --server https://mysuperserver/api/v2/check? Simplest patch would probably be: Check if cmdline.server is one of the keywords, if not, set the lt_server variable to the specified value (maybe with some pattern check if it's a valid URL) and set cmdline.server to "lt".