Ég set smekk á hana og fylli pelann með mjólk.

Both are first-person singular present tense forms:

• ég set = I put / I am putting
• ég fylli = I fill / I am filling

So the speaker is talking about what I do.

A couple of useful details:

• að setja is the infinitive to put, but the present ég-form is set.
• að fylla is the infinitive to fill, and the present ég-form is fylli.

Icelandic present tense often covers both the English simple present and the be + -ing form, so context tells you whether it is I put or I am putting.

Because smekk is the accusative singular form, and it is the direct object of set.

The dictionary form is smekkur. In this sentence:

• smekkur = nominative singular
• smekk = accusative singular

Since the speaker is putting a bib on someone, bib is the thing being acted on, so Icelandic uses the accusative.

This is a very common Icelandic pattern.

With á, Icelandic often distinguishes between:

• accusative for movement onto / toward
• dative for location on

Here the meaning is put a bib onto her, so there is movement, and that is why you get á hana.

Compare:

• Ég set smekk á hana. = I put a bib on her.
• Smekkurinn er á henni. = The bib is on her.

So:

• hana = accusative, because of movement
• henni = dative, because of location

Yes — it can mean both.

Smekkur can mean:

• taste / good taste / style
• bib

The context tells you which meaning is intended. In set smekk á hana, it clearly means bib, because you can put a bib on a child, but not taste.

Pelann is the definite accusative singular form of peli.

So:

• peli = a baby bottle / feeding bottle
• pelann = the baby bottle as a direct object

There are two things happening here:

1. It is definite: Icelandic often adds the as an ending on the noun instead of using a separate word.
2. It is accusative: because it is the direct object of fylli.

So fylli pelann means fill the bottle.

Here með means with, and in this use it normally takes the dative.

So grammatically, mjólk is functioning after a preposition that calls for the dative. The reason it looks unchanged is that some Icelandic nouns do not show a visible difference in that form.

So even though an English speaker may expect a special ending, Icelandic does not always show one clearly on the surface.

In this sentence:

• með mjólk = with milk

And the phrase means the bottle is being filled with milk as its contents.

Because the same subject applies to both verbs.

The sentence has two actions joined by og (and):

• Ég set smekk á hana
• og fylli pelann með mjólk

The subject ég belongs to both, so Icelandic does not need to repeat it. English works the same way:

• I put a bib on her and fill the bottle with milk.

You could repeat ég for emphasis, but normally you would not.

That is mainly a matter of context, not a special grammar rule of this sentence.

• smekk = a bib
• pelann = the bottle

This suggests that the bib is being mentioned more generally, while the bottle is a specific bottle already understood from the situation.

English does the same kind of thing:

• I put a bib on her and fill the bottle with milk.

So the sentence is not saying that Icelandic always makes one noun indefinite and the next one definite; it is just reflecting what is specific in the situation.

No. Peli usually means a baby bottle / feeding bottle, not a general bottle.

For a more general bottle, Icelandic often uses flaska.

So this sentence is specifically about feeding a baby or small child, which also fits well with smekk (bib).

Yes, Icelandic word order is somewhat flexible, but not completely free.

Ég set smekk á hana og fylli pelann með mjólk is a natural, straightforward order. It presents:

1. the action
2. the thing being put on
3. the person it goes onto
4. the second action
5. the thing being filled
6. what it is filled with

You may also see other orders for emphasis or style, but this version is a good neutral model for learners.

It can mean either, depending on context.

Icelandic often uses the plain present tense where English might choose either:

• I put / fill for a regular action
• I am putting / am filling for something happening right now

So the form itself does not force one reading. The surrounding context tells you whether it is habitual or happening at the moment.