Check spelling only via command line: how to?

Is it possible to launch LanguageTool from the command line to check a plain-text file for spelling mistakes only?

I searched the web for phases like LanguageTool command line check spelling only, but see no useful hits.

I maintain my own Russian dictionary for Hunspell adding modern usage words such as “коронавирус” or “цифровизация” and would be happy to suggest them to the LT dictionary. Obviously, I need to filter out new words in order not to suggest duplicates, and checking my dictionary via command line seems to be the only option. If, however, I’m missing something, point.