Persian (Farsi) hyphen

Every time that I open My document, this message appears in LO

I searched into Synaptic package manager (Linux Mint 20.1) but there is not this package (hyphen-fa)!

Also “libreoffice-l10n-fa” package is installed.

Please provide more detailed version information. The image shows 7.0.4-rc2. This is not enough. Report what is shown in Help>About LO. Moreover, “rc2” = release candidate which suggests this is not a “stable” version.

Many distributions use the Synaptic package managers. Is yours Ubuntu 20.04 ?

Please do not use Add Answer but edit your original question to enhance the details of your question (answers are reserved for solutions to a problem on this Q&A site).

I updated my quistion. Thanks.