Here is the re-post of my question as requested.
I am a new user who has poured over the questions and answers with no success.
LO version 18.104.22.168
MS Windows 10 with current updates.
The spell checker never worked except once there appeared a squiggly line under a word but it wouldn’t give me a suggestion and has never done it again. Typing a sentence with obvious errors then selecting “Tools/Spelling and Grammar” results the message: “Spellcheck is complete”.
Selecting Tools/Language - gets a check mark for English (USA) and no others.
Looking in: “Tools->Options …, Language Settings->Writing Aids” Items with checks are the following:
Lightproof grammar checker English.
Standard all English.
en US english USA.
Check spelling as you type.
Check uppercase words.
Check special regions.
Minimum number . . . . . 5
Characters before . . . . 2
Characters after. . . . . . 2
Hyphenate special regions.
Regarding: “in tools - Options - Language settings - Languages - Default Languages for Documents.” The defaults are set for English USA.