Learn Swedish: Kan du lägga till lite salt?

While addera translates to "add," it is strictly a mathematical term. For everyday additions like putting extra ingredients in a recipe, adding a file to an email, or contributing a comment, the particle verb lägga till is the correct choice.

Since salt is an ett-word, shouldn't it be litet salt?

In this sentence, lite is a quantifier meaning "some" or "a little bit of," and it never changes form to match the noun's gender. If you used litet, it would act as the adjective "small," making the sentence weirdly ask for "a small salt."

Which word gets the stress when pronouncing lägga till?

Because lägga till is a particle verb, the heavy stress falls on the particle till. If you stress lägga instead, a native speaker might mishear the sentence, as non-particle verbs usually carry the stress on the verb itself.

If I wanted to replace lite salt with the pronoun det (it), where would it go in the sentence?

It goes at the very end: Kan du lägga till det? Unlike English, where you can split a verb and its particle (Can you add it in?), Swedish particle verbs like lägga till must stay glued together before the object.