Hi,I'm sorry about the issue. What's the model of your Samsung tablet?Can you please open Apps, where it shows all your app icons (if needed, swipe from right to left to see more apps)
, then tap on the app icon Settings
, then tap on (General) -> Language and Input, then there, tap on your keyboard type (tap on each keyboard type as needed), then turn OFF the option Predictive text and/or Auto replace and/or Text correction and/or something similar there and check?When you are available, please reply at the box below to continue troubleshooting. Thank you.