Hmm.. so your Profile is in English Still. You answer will be definitely yes. As login in Hindi does not change your Language, so do following below steps to get a Hindi Facebook Profile.
Use Facebook In Hindi | Hindi Facebook
1.Login to your Facebook Account and go to My Account Setting.
2. Now click on Language and you will get a list of languages and now select Hindi or just press H from Keyboard and it will show language from letter H.
3. Now you will see that your whole profile is in Hindi leaving some words.
4.You can revert back this process or language any time you like. Just Have try.
We have also included the image of our Facebook Profile so you can have a look how Hindi Facebook looks.