yah it's right because beside hindi they have their own languge as a mother toung.

In India...... there are many regional languages..... but in most of the states people understand hindi (generally in northern, western and southern region people understand hindi).......... & in Mumbai (Bombay - which is now named as Mumbai) almost everybody understands hindi.

YES that is true. Like in MUMBAI (BOMBAY) Marathi is spoken widely beside Hind.i Every states have there own language.