Apache OpenOffice doesn't provide official 64-bit versions for Windows and Mac yet, so you will need a 32-bit Java on Windows and Mac. Note that if you have a 32-bit version of LibreOffice/OpenOffice, you will also need a 32-bit version of Java - LanguageTool will not work otherwise.For Mac users: LibreOffice ( Preferences -> LibreOffice -> Advanced). Make sure Java 8 or later is selected in LibreOffice ( Tools -> Options -> Advanced) or ( Tools -> Options -> Java).to disable LightProof and enable LanguageTool for the language you are working with to make LanguageTool work. Use Options -> Language Settings -> Writing aids -> Edit. LibreOffice comes with its own integrated grammar checker (LightProof) which disables LanguageTool for English and Russian.If installation of LanguageTool in LibreOffice/OpenOffice didn't throw an error but you are not sure if it actually works, please load this document and follow the instructions in it.

Solution home General LibreOffice/OpenOffice add-on Installation Issues with LibreOffice/OpenOffice

Openoffice base java problem