Hello Apoorva, 

One great way to detect language is through translator apps. However the most commonly used medium is Google translate. If you copy and paste any phrase in any language in the Google translate text box, then it will immediately detect the language. 

You can avail it here:  https://translate.google.com/?sl=auto&tl=en

You can also download the Google translate app on play store to be able to translate offline and through images as well. 

Hope this helps :)