!!! warning "Using language Custom Formats is not compatible with setting a preferred language in a quality profile in Radarr. You must use one or the other.<br>If you want to make use of the Custom Formats set the preferred language to `Any`."
??? FAQ "What's reverse scoring? - [CLICK TO EXPAND]"
With reverse scoring you add a Custom Format with a score of `-10000` and your preferred condition you negate.
So in the case of the following Custom Format `Language: Original Only`, it will actually match all Not Original releases and give it a score of `-10000`.
### Prefer language X over language Y
??? FAQ "Prefer language X over language Y - [CLICK TO EXPAND]"
If you want to prefer Prefer language X over language Y,
you add for example: `Language: Prefer Language X` with a score of `10`, and add `Language: Prefer Language Y` with score of `9`.
Which scores you should use depends on how important the language is compared to other Custom Formats you're using.
### What's Original Language
??? FAQ "What's Original Language? - [CLICK TO EXPAND]"
Original Language is the language in which a Movie/TV Show was originally made.
### Where does Radarr get the Original Language from
??? FAQ "Where does Radarr get the Original Language from? - [CLICK TO EXPAND]"
Radarr makes use of [The Movie Database (TMDB)](https://www.themoviedb.org/){:target="_blank" rel="noopener noreferrer"}.
![!The Movie Database (TMDB) Original Language](images/original-language-tmdb.png)
### Where does Sonarr get the Original Language from
??? FAQ "Where does Sonarr get the Original Language from? - [CLICK TO EXPAND]"
Sonarr makes use of [TheTVDB](https://thetvdb.com/){:target="_blank" rel="noopener noreferrer"}.
![!TheTVDB Original Language](images/original-language-tvdb.png)