if the sinature in other languege is valid or not?

Santha, you haven't mentioned which entrance exam is this regarding. If it is regarding NEET, you should follow the following instructions:

Uploading of Signature: Instructions
Candidates must sign with a black pen on a white background in JPG format with a file size of 4 Kb to 30 Kb

Now, it doesn't mention the language in which the Signature should be signed in. But if NTA finds the signature not falling within the lines of the set guidelines, it will notify you and you can re-upload your signature image during the correction window. If it is regarding any other exam apart from NEET, please do let us know and we shall help you with relevant information.

Hey!!

If the signature doesnt fall within the set guidelines of the exam concerned, the student is asked to reupload the signature which means what he/she uploads there is judged.

Hope it helps...