Hello, @songmanseh! I don't know of a way to change the language in Candy Crush. You might try tagging one of the community superstars, like @Elsa. You might have to tag her because I'm having technical difficulties with tagging people. Have a great day!
Please remember, for candy crush saga not need language setting. its operate by default device language & when app connected with facebook then its sync with facebook language. obviously app can't read device language for few time, when game not connected. If this problem from long time then check some setting
Go to Settings > Language & Input > Languages
Choose the desired language from the drop-down list and save. please feedback