Δεν φταις εσύ· φταίει η σύνδεση στο ίντερνετ.

Φταίω means to be at fault, to be to blame, or to be responsible for a problem. In this sentence, it is not about moral guilt in a very strong sense; it is more like who is causing the problem.

So:

• Δεν φταις εσύ = It’s not your fault / You’re not to blame
• Φταίει η σύνδεση = The connection is to blame / The connection is the problem

Because the verb changes depending on the subject.

The verb φταίω is conjugated like this in the present tense:

• εγώ φταίω = I am at fault
• εσύ φταις = you are at fault
• αυτός/αυτή/αυτό φταίει = he/she/it is at fault
• εμείς φταίμε = we are at fault
• εσείς φταίτε = you are at fault
• αυτοί/αυτές/αυτά φταίνε = they are at fault

So:

• φταις matches εσύ
• φταίει matches η σύνδεση because η σύνδεση is a singular noun

Yes, both verbs are in the present tense:

• φταις
• φταίει

Greek uses the present here for the current situation: right now, the problem is not you; the problem is the internet connection.

This is very natural in both Greek and English. It can also sound slightly general, as in the connection is what’s causing the problem.

Because εσύ adds emphasis or contrast.

Greek verb endings already show the subject, so Δεν φταις by itself already means You’re not at fault. But adding εσύ makes the contrast stronger:

• Δεν φταις εσύ = You’re not the one to blame
• implied contrast: something else is

That fits perfectly with the second clause: φταίει η σύνδεση στο ίντερνετ.

So the full sentence has a contrastive feeling:

• Not you
• the internet connection

Greek word order is more flexible than English word order.

In English, you normally need:

• The connection is to blame

In Greek, both of these are possible:

• Φταίει η σύνδεση
• Η σύνδεση φταίει

But they do not sound exactly the same.
Φταίει η σύνδεση is very natural when you are identifying the cause of the problem. It puts focus on η σύνδεση as the answer to what’s to blame?

So the sentence feels like:

• It’s not you; it’s the internet connection.

Δεν is the normal negation word for verbs in Modern Greek. It means not.

It usually goes right before the finite verb:

• Δεν φταις = You are not at fault
• Δεν ξέρω = I don’t know
• Δεν έχουμε χρόνο = We don’t have time

So in Δεν φταις εσύ, the negative word comes before φταις.

Στο is a contraction of:

• σε = to / in / at / on
• το = the

So:

• σε το becomes στο

This is standard in Modern Greek. Similar contractions include:

• σε την → στη(ν)
• σε τις → στις
• από το → απ’ το in some speech styles, though not always in the same way in standard writing

So στο ίντερνετ literally contains both the preposition and the article.

Literally, στο ίντερνετ can mean on the internet, in the internet, or to the internet, depending on context.

Here, with η σύνδεση, the whole phrase means something like:

• the connection to the internet
• more naturally in English: the internet connection

So Greek uses a structure that is a bit more explicit than English. English often turns this into a noun+noun phrase (internet connection), while Greek often keeps a prepositional phrase: σύνδεση στο ίντερνετ.

Greek uses the definite article much more often than English.

• η σύνδεση = the connection
• το ίντερνετ = the internet

In this sentence, η σύνδεση refers to the specific connection involved in the situation, so the definite article is natural.

And with ίντερνετ, Greek normally says το ίντερνετ, so when combined with σε, it becomes στο ίντερνετ.

For an English speaker, article use in Greek often feels more frequent and more automatic.

The mark · is called the ano teleia in Greek. It is a punctuation mark used for a pause stronger than a comma.

In this sentence, it separates two closely connected clauses:

• Δεν φταις εσύ
• φταίει η σύνδεση στο ίντερνετ

In English, you might write this with:

• a semicolon
• a colon
• or even a full stop, depending on style

So the punctuation here signals a clear pause and a contrast.

You would change the verb and pronoun to the εσείς form:

• Δεν φταίτε εσείς· φταίει η σύνδεση στο ίντερνετ.

That can mean either:

• It’s not your fault when speaking formally to one person
• It’s not your fault when speaking to more than one person

So:

• informal singular: Δεν φταις εσύ
• formal singular / plural: Δεν φταίτε εσείς