---
title: language
framework: mapkitjs
role: symbol
role_heading: Interface Property
path: mapkitjs/directionsconstructoroptions/language
---

# language

A language ID that determines the language for route information.

## Declaration

```data
language?: string;
```

## Discussion

Discussion When you set the language to a language ID such as fr-CA or en-GB, MapKit JS returns step-by-step directions in the specified language, if available. If you don’t set the language when initializing a Directions object, the directions default to the language ID the system provides when initializing the map with init(options). If the map doesn’t have a specified language upon initialization, MapKit JS returns directions in the browser’s language setting. For more information about language IDs, see Internationalization and Localization Guide.