> For the complete documentation index, see [llms.txt](https://worldboxopenmods.gitbook.io/mod-tutorial-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://worldboxopenmods.gitbook.io/mod-tutorial-en/packed/basicmod.md).

# Basic Mod

Basic Mod is exactly class `BasicMod`. If you want these features, you should make your mod main class inherit from `BasicMod` instead of `MonoBehaviour` and `IMod`.

## Mod Loading

`BasicMod` is different with `IMod` in modder's layer. BasicMod implements `OnLoad` in IMod, and call `OnModLoad` to initialize mod. You should implement OnModLoad in BasicMod instead of OnLoad.

## Multilingual

`BasicMod` loads files under folder `Locales` automatically. `cz.json` is Simplified Chinese, `en.json` is English, `ch.json` is Tranditional Chinese.

The following is an example of localization for Simplified Chinese in JSON format.

```jsonc
// cz.json
{
    "Humans": "人类",
    "Orcs": "兽人"
}
```

Except of `.json` file, you can also use `.csv` to make localization.

The following is an example `lang.csv`

```csv
key,cz,en,ch
Humans,人类,Humans,人類
Orcs,兽人,Orcs,獸人
```

File name for `.csv` is not important.

## Mod Configuration

`BasicMod` provides default mod configuration file(`default_config.json` under mod's folder) and consistent user's mod configuration.

You can write `default_config.json` refer to [Mod Configuration](/mod-tutorial-en/basic-concepts/modconfiguration.md)

### Default mod configuration file

It provides format of mod configuration and default values for them.

#### When add/remove configuration item(excluding modifying default value)

Consistent user's mod configuration will add/remove corresponding items with new default values.


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