Run the following command in the folder where Flarum is installed:
composer require madnest/flarum-lang-czech| Component | Status |
|---|---|
| Core |  |
| Validation |  |
| Extension | Status |
|---|---|
fof/forum-statistics-widget |
 |
fof/links |
 |
fof/pages |
 |
fof/recaptcha |
 |
fof/terms |
 |
fof/user-bio |
 |
fof/user-directory |
 |
| Extension | Status |
|---|---|
clarkwinkelmann/flarum-ext-emojionearea |
 |
sycho/flarum-profile-cover |
 |
Thanks to @ogioncz for the base