Por suerte, el rasguño no le duele mucho y aun así quiere ayudar a ordeñar.

Por suerte means luckily or fortunately.

It works like a sentence opener that comments on the whole statement, so the comma helps separate it from the main clause:

• Por suerte, el rasguño no le duele mucho...
• Luckily, the scratch doesn’t hurt him/her much...

In English, we often do the same thing with Luckily, or Fortunately,.

El rasguño means the scratch or the scrape.

A few useful points:

• It is a masculine noun, so it takes el
• It comes from the verb rasguñar, meaning to scratch
• The ñ is pronounced like the ny in canyon

So:

• un rasguño = a scratch
• el rasguño = the scratch

Spanish expresses pain differently from English.

The usual pattern is:

• A alguien le duele algo
• literally: Something hurts to someone

So in this sentence:

• el rasguño = the thing that hurts
• le = to him / to her / to you (formal)
• duele = hurts

So el rasguño no le duele mucho literally means:

• the scratch doesn’t hurt him/her much

This is a very common Spanish structure:

• Me duele la cabeza = My head hurts / I have a headache
• Le duele el brazo = His/Her arm hurts

Because the verb agrees with el rasguño, which is singular.

• el rasguño duele = the scratch hurts
• los rasguños duelen = the scratches hurt

So:

• El rasguño no le duele mucho = singular
• Los rasguños no le duelen mucho = plural

Even though English focuses on the person feeling pain, Spanish grammar makes the thing that hurts the subject of the verb.

Le is an indirect object pronoun meaning:

• to him
• to her
• to you (formal singular)

By itself, le does not tell you whether the person is male or female. You need context for that.

So no le duele mucho could mean:

• it doesn’t hurt him much
• it doesn’t hurt her much
• it doesn’t hurt you much

Most likely, from context, it refers to the person who has the scratch.

Here mucho means much or very much.

• no le duele mucho = it doesn’t hurt much / it doesn’t hurt very much

It comes after the verb phrase, which is very natural in Spanish.

Compare:

• Le duele mucho = It hurts a lot
• No le duele mucho = It doesn’t hurt much

So mucho is modifying the idea of hurting.

Aun así means even so, nevertheless, or all the same.

It introduces a contrast:

• the scratch doesn’t hurt much,
• even so, the person still wants to help.

About the spelling:

• aún with an accent often means still or yet
• aun without an accent often means even

In the expression aun así, it means even so, so it is normally written without the accent.

Spanish often leaves out subject pronouns when the verb already makes the subject clear.

• quiere = he/she wants

So the subject is understood from context rather than stated.

In this sentence, the most natural interpretation is that the person referred to by le is also the one who quiere ayudar. In other words, the person with the scratch still wants to help.

Spanish does this all the time:

• Tiene hambre = He/She is hungry
• Quiere salir = He/She wants to go out

There are actually two useful grammar points here.

1. After querer, Spanish uses the infinitive directly:

• quiere ayudar = wants to help

You do not say quiere a ayudar.

2. After ayudar, Spanish often uses a + infinitive:

• ayudar a ordeñar = to help milk / to help with milking

So the a belongs with ayudar, not with quiere.

Also, ordeñar means to milk an animal, usually a cow or goat.

Because Spanish, like English, can leave that unstated if it is obvious from context.

• ayudar a ordeñar = help with milking / help milk

If the situation is already clear—perhaps they are on a farm—there is no need to say las vacas.

If you wanted to be more explicit, you could say:

• quiere ayudar a ordeñar las vacas = he/she wants to help milk the cows

So the original sentence is perfectly natural and simply leaves the object understood.