LanguageTool is an Open Source proofreading software for English, French, German, Polish, Russian, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect. LanguageTool can make use of large n-gram data sets to detect errors with words that are often confused. To add the ngram data to the docker, download the languages you want from here: https://languagetool.org/download/ngram-data/, move it to your server and link the location in the container path /ngrams. By default, this is set to the appdata folder. More information on ngram data can be found here: https://dev.languagetool.org/finding-errors-using-n-gram-data