Η φιλοξενία σε εκείνο το χωριό ήταν τόσο καλή που θέλω να πάω ξανά το καλοκαίρι.

Greek uses the definite article much more often than English. With subjects, abstract nouns, and general ideas, the article is very common.

So Η φιλοξενία literally looks like the hospitality, but in natural English it is simply hospitality.

This is normal Greek, not extra emphasis.

Because καλή has to agree with φιλοξενία.

• φιλοξενία is feminine
• it is singular
• it is the subject of the sentence

So the adjective also becomes feminine singular:

• masculine: καλός
• feminine: καλή
• neuter: καλό

That is why Greek says Η φιλοξενία ... ήταν τόσο καλή.

τόσο ... που means so ... that.

In this sentence:

• τόσο καλή = so good
• που θέλω να πάω ξανά = that I want to go again

So Greek is using a very common result pattern:

• τόσο + adjective/adverb + που + clause

Examples:

• Ήταν τόσο κουρασμένος που κοιμήθηκε αμέσως. = He was so tired that he fell asleep immediately.
• Μιλάει τόσο γρήγορα που δεν καταλαβαίνω. = He speaks so fast that I don’t understand.

ήταν is the past form of είμαι = to be.

Historically it is the imperfect, and in Modern Greek it is the normal way to say was / were.

Here it describes a past state:

• Η φιλοξενία ... ήταν τόσο καλή = The hospitality was so good

That fits well because the sentence is describing what the hospitality was like, not a one-time completed action.

Because in Greek, demonstratives like this and that are normally used together with the definite article.

So:

• εκείνο το χωριό = that village
• literally: that the village

This is standard Greek structure.

You can compare:

• αυτό το σπίτι = this house
• εκείνη η πόλη = that city
• εκείνο το χωριό = that village

The preposition σε usually takes the accusative.

So χωριό here is in the accusative. But because χωριό is neuter singular, the nominative and accusative forms are the same:

• nominative: το χωριό
• accusative: το χωριό

As for στο:
Greek often combines σε + το into στο.

So:

• σε το χωριό becomes στο χωριό

But here there is a demonstrative in the middle:

• σε εκείνο το χωριό

Because εκείνο comes between σε and το, you do not contract it to στο.

Modern Greek normally does not use an infinitive the way English does.

So instead of saying something like I want to go with a separate infinitive, Greek says:

• θέλω να πάω
• literally: I want that I go

After verbs like θέλω, μπορώ, πρέπει, ξέρω, Greek usually uses:

• να + verb

This is one of the most important Greek patterns to learn.

Examples:

• Θέλω να φύγω. = I want to leave.
• Μπορώ να έρθω; = Can I come?
• Πρέπει να διαβάσω. = I must study.

This is about aspect.

Very roughly:

• πηγαίνω is the more imperfective form
• πάω is the more perfective form

After να, the perfective form is often used when talking about a single trip or a single complete action.

Here the speaker wants to go مرة/once again at some future time, so να πάω sounds very natural.

Compare the general idea:

• Θέλω να πηγαίνω εκεί κάθε καλοκαίρι. = I want to go there every summer.
  → repeated/habitual
• Θέλω να πάω εκεί το καλοκαίρι. = I want to go there in the summer.
  → one trip / one occasion

Yes, both ξανά and πάλι can mean again, but ξανά is often the clearer choice when you simply mean repetition.

Here:

• να πάω ξανά = to go again

πάλι can also mean again, but it has some extra uses depending on context, such as still, back to the same thing, or sometimes a contrastive feeling.

So in this sentence, ξανά is straightforward and natural.

Greek very often uses the article with time expressions.

So το καλοκαίρι is a normal way to say:

• in summer
• in the summer
• sometimes this/next summer, depending on context

The article does not always need to be translated.

Other common examples:

• τον χειμώνα = in winter
• την Κυριακή = on Sunday
• το βράδυ = in the evening / at night

In this sentence, το καλοκαίρι most naturally means in the summer.

Yes. Greek word order is more flexible than English word order.

The sentence as written is natural:

• θέλω να πάω ξανά το καλοκαίρι

But you could also hear:

• θέλω να ξαναπάω το καλοκαίρι
• το καλοκαίρι θέλω να πάω ξανά

These versions are very close in meaning, but the emphasis changes slightly.

For example:

• το καλοκαίρι at the front gives more focus to in the summer
• ξαναπάω or πάω ξανά puts the idea of again in slightly different positions

So the original word order is not the only possible one, but it is perfectly normal Greek.