Spellchecking
All dictionaries mentioned below use the same word base and grammar and theoretically should work the same.
If you use Firefox browser, download the add-on for Firefox. If you use Thunderbird e-mail client, download the add-on for Thunderbird.
There is also an extension of users of LibreOffice and OpenOffice.org.
If you use Google Chrome browser or similar (like Chromium or Iron), see instructions for Chrome.
If your program uses Hunspell spellchecker engine (for example, Opera browser), see instructions for Hunspell.
If your program uses Aspell spellchecker engine (for example, Pidgin or KDE), see instructions for Aspell.
If you managed to install Lower Sobian spellchecking, you can check here how it works: right-click the text field below and use the dictionary from your browser.