Learn Swedish: Är kvinnan glad idag? - Is the woman happy today?

This sentence is a yes/no question, which means it doesn't need a question word. To turn the statement Kvinnan är glad (The woman is happy) into a question, you simply move the verb to the very front to get Är kvinnan glad? (Is the woman happy?).

Why is the word for woman kvinnan instead of just kvinna?

Kvinna means woman. To say the woman, Swedish doesn't put a separate word for the in front of the noun. Instead, it attaches an ending directly to the noun. For a word like kvinna, we just add -n to the end to get kvinnan (the woman).

Would the word glad change if we were talking about more than one woman?

Yes! In Swedish, adjectives have to match the noun they describe. Because kvinnan is a singular en-word, we use the base form glad. If we were asking about multiple women, we would add an -a to the end to make it plural: Är kvinnorna glada? (Are the women happy?).

I sometimes see the word for today written as two words (i dag). Are both versions correct?

Yes, you will see it written both as one word (idag) and as two separate words (i dag). Both are completely correct, very common, and mean exactly the same thing.