From Libreoffice: 
https://github.com/LibreOffice/dictionaries.git
=> copy *.aff, *.dic to /usr/share/hunspell/

From Ubuntu:
sudo apt install hunspell-cs
sudo apt install hunspell-de-de
sudo apt install hunspell-el
sudo apt install hunspell-en-gb
sudo apt install hunspell-en-us
sudo apt install hunspell-es
sudo apt install hunspell-fr
sudo apt install hunspell-it
sudo apt install hunspell-lt
sudo apt install hunspell-nl
sudo apt install hunspell-pl
sudo apt install hunspell-pt-br
sudo apt install hunspell-ru
sudo apt install hunspell-sl
sudo apt install hunspell-sv
sudo apt install hunspell-tr
sudo apt install hunspell-uk
sudo apt install myspell-hy
cd /usr/share/hunspell
ls