Onlyoffice - Document server - ubuntu - Spelling checker did not work

Nextcloud version 18.4
Operating system and version Ubuntu 18.04
Apache 2.4.29
PHP version 7.2.24
Community Document Server 0.1.5
OnlyOffice 4.1.4

Spelling checker is not working.
In fact, I did not find where and how to install dictionaries languages. Note that english spelling is also not working.

Nobody ?
Let’s up this topic.