Globe icon missing on iPad keyboard

If you have enabled the Emoji Keyboard, the globe button will change to an Emoji button.

To access other language keyboards that you have already enabled in iPad settings, simply touch-and-hold the Emoji key at bottom left of the iPad's onscreen keyboard.

The globe keyboard icon changes to the emoji icon if the emoji keyboard has been added to your configured keyboards. It is only the icon that differs; you can still switch between your configured keyboards as before.