If your iPhone’s dictionary does not contain a word you frequently use in your notes, emails or text messages, it will underline the word and suggest what it thinks is the correct word. This frequently happens when you use technical terms or Internet slang. You can’t manually edit the iOS’s internal dictionary, but you can use a workaround to make the device accept the word by creating a shortcut. Tips Warnings Writer Bio

How to Get the Red Underline Off of a Word on Your iPhone - 91