# isSingleLetterKey

```ts
function isSingleLetterKey(key): boolean;
```

Defined in: [constants.ts:339](https://github.com/TanStack/hotkeys/blob/main/packages/hotkeys/src/constants.ts#L339)

Whether a key is a single Unicode letter, such as `'a'` or `'é'`.

## Parameters

### key

`string`

## Returns

`boolean`