---
title: "getLanguageInfoFromFlag | JavaScript maps SDK"
description: "Documentation for MapTiler SDK"
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Function getLanguageInfoFromFlag

-   getLanguageInfoFromFlag(  
        languageFlag: string,  
        languageDictionary?: { \[k: string\]: [LanguageInfo](https://docs.maptiler.com/sdk-js/api-reference/types/LanguageInfo/) },  
    ): [LanguageInfo](https://docs.maptiler.com/sdk-js/api-reference/types/LanguageInfo/) | null[](#getlanguageinfofromflag)
    
    Get the language info from a language flag (e.g. `"name:en"`). This is also handy to check is a given language flag is a supported language. By default, the language dictionary to look into is the one defined in this library, but another one could be provided Returns `null` if not found.
    
    #### Parameters
    
    -   languageFlag: string
    -   `Optional`languageDictionary: { \[k: string\]: [LanguageInfo](https://docs.maptiler.com/sdk-js/api-reference/types/LanguageInfo/) }
    
    #### Returns [LanguageInfo](https://docs.maptiler.com/sdk-js/api-reference/types/LanguageInfo/) | null