# baseLang

**Kind:** Function

**Source:** [`atloria-monorepo/apps/web/src/app/p/[slugId]/components/uiStrings.ts`](https://github.com/sherkety/atloria/blob/main/atloria-monorepo/apps/web/src/app/p/[slugId]/components/uiStrings.ts#L876)

Normalize a language code ('ar', 'ar-SA', 'AR') to its base lowercase form.

## Signature

```ts
function baseLang(lang: string | null): string
```

## Parameters

| Name | Type |
|---|---|
| `lang` | `string | null` |

**Returns:** `string`