Hello. With version 100.0 came multi-language spellchecking. I would like to know how exactly does it work, please. For instance, if I enable both English and French, will it simply virtually add the two dictionaries and use the resulting combined list of words? Or will it try to understand if a paragraph or sentence is English and mark non-English words in that paragraph/sentence as incorrect even if they are French? I am obviously asking this because there is no detailed information at https://support.mozilla.org/en-US/kb/how-do-i-use-firefox-spell-checker.