I am using LT as my own server, challenged by the following error message
org.languagetool.language.LanguageIdentifier Cannot consider noopLanguages because not in fastText mode: [en, en]
I installed FastText from Get started · fastText
The --help option told me that I have to point to a File, but I wonder which one? The FastText Folder contains almost 600 Files. 
fasttextModel is the model from Language identification · fastText, fasttextBinary is the fastText binary itself (called fasttext on my installation).
It may not work because I host it locally via wsl.
If I search the executable It cannot be found.
whereis fasttext
fasttext:
But in my Config I link to the installation folder
fasttextmodel=/mnt/c/Users/Me/Desktop/LanguageTool-4.8/lid.176.bin
fasttextBinary=/mnt/c/Users/Me/Desktop/LanguageTool-4.8/fastText/second/fastText/fasttext
In my mind this should work but:
WARN org.languagetool.language.LanguageIdentifier Cannot consider noopLanguages because not in fastText mode: [de, en]
Did you spell it like that? It’s fasttextModel.
Alright. Solved. Thanks
The next version of LT will now print a warning if a key is not known.