In LibreOffice Writer 5.4.1, I prefer to use the English menu, however I have lots of documents which are not in the English language.
1/ How do I set the language of document for the grammar and spell check?
Ex: A document is recognised as English, but actually it’s French.
2/ How to specify that a specific paragraph is in another language?
3/ Why the menu toolbar stays as light gray, can’t add language in Tools>Dictionnaries