Function setLanguagePreference

setLanguagePreference(storageKey: string, language: string): boolean
Canonicalize and persist a website language.

Usage:
```
import { setLanguagePreference } from "mazey";

const stored = setLanguagePreference(
  "MY_WEBSITE_LANGUAGE",
  "ZH_cn"
);

console.log(stored);
```
Output when browser storage is available:
```
true
```
The stored value is canonicalized to:
```
zh-CN
```
Parameters
- storageKey: string
  Project-specific local-storage key.
- language: string
  Language tag to canonicalize and persist.
Returns boolean
true when storage succeeds, or false when storage is unavailable or rejects the write.

Throws
If storageKey is empty or language is empty or malformed.

Remarks
Safe during SSR. This function writes only the canonical language and never mutates the DOM, applies translations, redirects, or adds listeners.
- Defined in language.ts:211