Thank you for your message. Spellcheck is a function of the keyboard. Please go into your keyboard settings to see if you have that option for that keyboard.
KEYBOARD SETTINGS (might differ slightly per device)
Settings (the 'wheel icon on your device)>
Language and Input>
Find your keyboard and select the ‘wheel’ icon next to it;
Select ‘Text Correction’ to adjust your settings.
Review your other keyboard settings.
I hope this helps!