Validation rule over input language for text area

Is it possible to validate the input content language for text box area, I want to limit only to enter the English language in a text area, how to validate user input is English or not?
1 answers

Have you considered using Azure Cognitive Services? The Azure Text Analytics REST API has a Language Detection feature.

There are also a lot of free api’s like (up to 5000 calls a month) , but I don’t know what the quality is.