La meva veïna m'ha convidat a ballar quan ha començat la cançó.

In Catalan, possessives usually go with a definite article, so la meva veïna is the normal pattern.

• la meva veïna = my neighbor
• el meu llibre = my book
• la seva casa = his/her/their house

This is different from English, which normally says just my neighbor without an article.

There are some exceptions, especially with certain family words in some contexts, but for veïna, the article is expected.

m'ha is a contraction of em ha.

• em = me
• ha = has / the auxiliary used to form the perfect tense

So:

• m'ha convidat = has invited me

The e in em drops before a vowel, which is why you get m'ha instead of em ha.

Here, m' is a direct object pronoun.

The verb pattern is:

• convidar algú a fer alguna cosa = to invite someone to do something

So in this sentence:

• La meva veïna m'ha convidat a ballar
• literally: My neighbor has invited me to dance

The person being invited is the direct object, so m' stands for me as a direct object.

Because convidar is commonly followed by a + infinitive when you say what someone was invited to do.

So:

• convidar algú a ballar = to invite someone to dance
• convidar algú a sopar = to invite someone to have dinner
• convidar algú a entrar = to invite someone to come in

That a is part of the normal verb pattern.

That is the present perfect in Catalan:

• ha convidat = has invited / invited
• ha començat = has started / started

Catalan often uses this tense where English would simply use the simple past, especially for recent past events or events still connected to the present.

So although the form is literally closer to has invited and has started, the natural English translation may be:

• My neighbor invited me to dance when the song started

In this sentence, it means the song started.

Here, la cançó is the subject, even though it comes after the verb. Catalan often allows the subject to appear after the verb, especially in clauses like this.

So:

• ha començat la cançó = the song started

A learner might expect the subject to come first, but Catalan word order is more flexible than English.

The ï is a diaeresis, and it shows that the vowels are pronounced separately.

So veïna is pronounced roughly as:

• ve-EE-na

not like a single blended vowel sound.

This also helps show the relationship with the masculine form:

• veí = male neighbor
• veïna = female neighbor

The diaeresis is very common in Catalan spelling and often tells you not to merge two vowels into one syllable.

Yes. You can also say:

• Quan ha començat la cançó, la meva veïna m'ha convidat a ballar.

This means the same thing. Catalan is quite flexible with clause order, especially with time expressions like quan.

So both are fine:

• La meva veïna m'ha convidat a ballar quan ha començat la cançó.
• Quan ha començat la cançó, la meva veïna m'ha convidat a ballar.

The difference is mostly one of emphasis and style.

Yes. You may also hear or read:

• La meva veïna em va convidar a ballar quan va començar la cançó.

Catalan has another very common past tense, the periphrastic past:

• va convidar
• va començar

In many contexts, especially in narration, this is extremely common and may sound more natural depending on the variety of Catalan and the situation.

So the sentence with ha convidat / ha començat is grammatical and natural, but va convidar / va començar is also very common.