red zigzag line under what i typed

[princeton]

the red zigzag lines are all over what i typed. it wasnt like this
yesterday.

normally it only happens if the word is spelled wrongly. pls advice.

it says the words are not found in the dictionary... but what i typed
are standard English words.

 

[Michel Bintener]

Though you may be writing in English, Word doesn't know that unless you mark
your text as such. Select your text, then go to Tools>Language and select
the appropriate variety of English. If you always want to use that variety
of English, click on the Default button in the lower left corner to make it
your default language.