Sorry for going off-topic, but does 5.7 address the wild instability some users are seeing in 5.6?
https://forum.languagetool.org/t/5-6-plugin-for-libreoffice-wildly-unstable/7725
https://forum.languagetool.org/t/languagetool-5-6-causes-libreoffice-writer-to-crash/7721