Language models from libretranslate.com

Hello!
Sorry if this was already answered elsewhere, but I couldn’ find it. I am looking to self host libre translate on my server. I run all the commands, and libre translate is now up and running on my server. However the language models on my server are different compared to the ones on libretranslate .com, I have less language models. How can install them? Such as Serbian and other models. A step by step tutorial is really appreciated as I am really unfamiliar with libretranslate. Thank you very much!

PS. I am using Debian 13