In aiims 2019 form, by mistake I filled question paper to be in hindi instead of English and now there are no any correction dates what I do

Dear Sahil, you needn't worry because when you choose a language other than English for the exam paper, you will get questions both in English and the language you chose. In your case, even if you chose Hindi by mistake, the Questions will be asked both in Hindi and English. And you can answer based on the Questions asked in English.