Adding a new spell-checker to Motorola Moto G Does anybody know how can I add a new spell-checker to Motorola Moto G (it runs Android 4.3 Jelly Bean)? 

I have the spell-checker for UK version, but I also would like to use Polish spell-checker.
The following is the way I enable additional spell checkers on my Galaxy Nexus which runs on vanilla Android 4.3, I hope it will be the same for your Moto G:


Open your app drawer and go to Settings > Language &amp; input
Scroll down to Keyboard &amp; Input Methods section: If your Google Keyboard is enabled, tap its settings button, if not, enable it first.
On Google Keyboard Settings screen, tap Input languages

  
On Input languages screen, scroll down and enable Polish. Then tap Back.
You should be on Google Keyboard Settings screen again: Scroll down to Text Correction section and tap Add-on dictionaries.
On Add-on dictionaries screen, scroll down and tap Polski (which it should say it is available).

  
Now it should appear a button to Install this dictionary: tap it and wait until it is installed.
Now, the Install button will be replaced for a Delete button, and the dictionary status will say Installed. Exit settings screens.
Now you can use the Polish spell checker in the phone. Just toggle the language by tapping the Globe key to the left of Spacebar in Google Keyboard until it says Polski and you'll be ready to use it.