Learn Swedish: Luta dig mot väggen. - Lean against the wall.

In Swedish, leaning your body is a reflexive action: att luta sig (literally "to lean oneself"). When giving a command to one person, you use the imperative verb (luta) alongside the matching reflexive pronoun for "you" (dig).

How would this sentence change if I were telling a group of people to lean against the wall?

The verb itself wouldn't change, as imperative verbs look the same whether you are talking to one person or fifty. However, you must change the reflexive pronoun to match the plural "you" (ni). You would say: Luta er mot väggen.

Is the imperative form luta identical to its infinitive?

Yes! For "Group 1" verbs (verbs that end in -ar in the present tense, like lutar), the imperative is always exactly the same as the infinitive. Both end in an -a.

Does mot mean "against" or "towards"?

It means both, depending on the context! When talking about physical support, like leaning on a wall, mot translates to "against". In other contexts, like walking in a certain direction, it means "towards".