#426 Enhance LanguageTool preference explanation

[Hiroshi Miura]

LanguageTool configuration allow users to select Three options.
1. use bundled version(LT 6.1)
2. use remote server
3. launch a LT server jar unzipped from distribution

There is no description of the options, but just say service type

Service type

Select the location of the language checker.

Using a different language checker on your local machine than the one supplied with OmegaT allows you to customize the verification rules.

https://omegat.sourceforge.io/manual-snapshot/en/chapter.dialogs.preferences.html#dialog.preferences.languagetool.plugin

[Hiroshi Miura]

It requires a description how to download and extract LT server distribution and which file should be specified in the dialog box.
A manual can point https://languagetool.org/download/ for the site, advanced users can download LanguageTool software disbribution.
https://languagetool.org/download/LanguageTool-stable.zip is the file, users may be interested in.

When unzipping the file, LanguageTool-stable.zip, users will see files such as

• README.md
• COPYING.txt
• languagetool.jar
• languagetool-commandline.jar
• languagetool-server.jar

and folders such as

• META-INF
• libs
• org

Users should select "languagetool-server.jar" on a third option of the OmegaT preference dialog.
Files under libs are also required for running server application, there are all of dependency libraries.
The server jar files does not bundled with languagetool core library. If user copy the languagetool-server.jar file to another place, it wont work.

Advanced users also may be interested in ngram data, which is distributed from https://languagetool.org/download/ngram-data/

[Hiroshi Miura]

When a user contract with LanguageTool premium service, the user may want to select 2nd option of OmegaT dialog, and specified the endpoint of the LanguageTool API server. Here is the public API documentation https://dev.languagetool.org/public-http-api

When users have a self hosted LT server, as localhosted server or team sharing server, the user may want to use it. OmegaT 2nd option is also for them. When specify a localhosted server with a default configuration, URL will be http://localhost:8081/v2/check