Yes, Micromax Bharat 1 (2018) does have the front camera.
Yes, Micromax V409 (Bharat 1 2018) does have the support for the Marathi language. You can change the entire phone's language to the Marathi. You can store contacts, write messages in Marathi, too.
Yes, You can use Micromax Bharat 1 V409 has a wifi hotspot. You can use your 4G SIM card and can enjoy seamless internet browsing.
Yes, Micromax Bharat 1 does have the removable 1800 mAh battery.