I'm running LanguageTool-2.8 on Linux and something odd just happened:
I was running sentences with mispelled and unknown words through languagetool-commandline (on my way to discovering that added.txt does not work for English, but hunspell/ignore.txt should be used) and I suddenly saw a message similar to the following - which I had not been getting all the time I experimented:
7.) Line 3, column 124, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA
Message: Did you forget a comma after a conjunctive/linking adverb?
...th words like Bitcoin, Bitcoins and bitcoin. Also stochastics and decentralized corrective wav...
I was getting this "Missing Comma" suggestion when Also was misspelled as "Aslo", but as soon as I used the --api switch it no longer showed up. Languagetool only started reporting the error again when I corrected the spelling of "Also":
I'm wondering why Languagetool was identifying both the spelling error ("Aslo") and the missing comma before. Then stopped identifying the missing comma when I enabled --api ?
Only by manually correcting "Aslo" to "Also" did I get it to report the missing comma again.
$ java -jar languagetool-commandline.jar -l en-US -c utf-8 in.txt