Όταν μιλάω ελληνικά με τη φίλη μου, είμαι πιο χαρούμενος.

Όταν means when.

In this sentence, it introduces a time clause:

Όταν μιλάω ελληνικά με τη φίλη μου = When I speak Greek with my friend

It can describe:

• something that happens regularly or habitually, as here
• something that happens at a particular time, depending on context

So here the idea is: Whenever/when I speak Greek with my friend, I am happier.

Both μιλάω and μιλώ mean I speak.

They are just two common forms of the same verb:

• μιλάω = very common in everyday speech
• μιλώ = also correct, sometimes a little more formal or concise

So these are both possible:

• Όταν μιλάω ελληνικά...
• Όταν μιλώ ελληνικά...

A learner should recognize both.

Greek usually does not need the subject pronoun when it is already clear from the verb ending.

• μιλάω already means I speak
• είμαι here means I am

So εγώ is unnecessary unless you want emphasis or contrast.

For example:

• Όταν μιλάω ελληνικά... = normal, natural
• Όταν εγώ μιλάω ελληνικά... = more emphatic, like when I speak Greek...

Greek is a language that often drops subject pronouns because the verb form gives that information.

ελληνικά means Greek as a language.

So:

• Μιλάω ελληνικά = I speak Greek

This is a standard way to name languages in Greek.

A useful comparison:

• ελληνικός / ελληνική / ελληνικό = Greek as an adjective, as in Greek food, Greek culture, etc.
• Ελλάδα = Greece, the country
• ελληνικά = Greek, the language

So in this sentence, ελληνικά is exactly the form you want for speak Greek.

This is a very common question.

Yes, ελληνικά is formally the neuter plural form, but when talking about a language, Greek uses this form idiomatically.

So even though it looks plural, it simply means Greek.

The same pattern appears with other languages:

• αγγλικά = English
• γαλλικά = French
• ισπανικά = Spanish

So:

• Μιλάω αγγλικά = I speak English
• Μιλάω ελληνικά = I speak Greek

You do not need to translate it as a plural in English.

Let’s break it down:

• με = with
• τη = the (feminine accusative singular)
• φίλη = female friend / sometimes girlfriend, depending on context
• μου = my

So: με τη φίλη μου = with my friend

After με, Greek uses the accusative case, which is why you get τη φίλη.

Both τη and την are correct forms of the for feminine accusative singular.

In modern Greek, the final -ν is often dropped before many consonants in everyday use.

So both can appear:

• με τη φίλη μου
• με την φίλη μου

The shorter form τη is extremely common and natural.

You will see both in writing, depending on style and pronunciation habits.

It can mean either, depending on context.

• η φίλη μου literally means my female friend
• In many contexts, it can also mean my girlfriend

So in this sentence, without more context, both interpretations are possible:

• When I speak Greek with my female friend, I am happier
• When I speak Greek with my girlfriend, I am happier

Greek often leaves this to context, just like English sometimes does with my friend.

In Greek, possessive words like μου (my) usually come after the noun.

So:

• η φίλη μου = my friend
• literally something like the friend my

This is normal Greek word order.

You can think of it as the standard pattern:

• ο αδερφός μου = my brother
• το σπίτι μου = my house
• η φίλη μου = my friend

The comma separates the time clause from the main clause.

• Όταν μιλάω ελληνικά με τη φίλη μου, = subordinate clause
• είμαι πιο χαρούμενος. = main clause

In English, we also often use a comma when a clause like when... comes first:

• When I speak Greek with my friend, I’m happier.

So the punctuation works very similarly here.

πιο means more, so πιο χαρούμενος means happier or more happy.

• χαρούμενος = happy
• πιο χαρούμενος = happier

Greek often forms comparatives with πιο + adjective.

Examples:

• πιο καλός = better / more good
• πιο μεγάλος = bigger
• πιο εύκολος = easier

So είμαι πιο χαρούμενος means I am happier.

Yes. Greek sometimes has one-word comparative forms, but πιο + adjective is the most common and easy pattern for learners.

For happy, the natural everyday form is:

• πιο χαρούμενος

This is the safest structure to learn and use widely.

χαρούμενος is the masculine singular form.

So this sentence suggests that the speaker is male.

If the speaker were female, it would usually be:

• Όταν μιλάω ελληνικά με τη φίλη μου, είμαι πιο χαρούμενη.

So the adjective changes to match the gender of the person speaking.

Basic forms:

• χαρούμενος = masculine
• χαρούμενη = feminine
• χαρούμενο = neuter

It is the present tense.

Here it does not mean only I am speaking right now. In a sentence with Όταν, it often describes a repeated or usual situation:

Όταν μιλάω ελληνικά με τη φίλη μου... = When/whenever I speak Greek with my friend...

So this is a habitual or general statement, not necessarily something happening at this exact moment.

Not completely. Greek word order is more flexible than English, although some orders sound more natural than others.

The given sentence is very natural:

• Όταν μιλάω ελληνικά με τη φίλη μου, είμαι πιο χαρούμενος.

You could also hear variations such as:

• Είμαι πιο χαρούμενος όταν μιλάω ελληνικά με τη φίλη μου.

That version means the same thing, just with the main idea first:

• I’m happier when I speak Greek with my friend.

So Greek word order can shift for emphasis, rhythm, or style.

Yes, you may hear both.

• μιλάω ελληνικά = I speak Greek
• μιλάω στα ελληνικά = I speak in Greek

The version without στα is very common and straightforward when naming a language after speak.

So in this sentence, μιλάω ελληνικά is perfectly natural and probably the most direct choice.

In Greek, names of languages are normally not capitalized.

So:

• ελληνικά = Greek
• αγγλικά = English
• γαλλικά = French

This is different from English, where language names are capitalized.

So ελληνικά with a small letter is correct.

The structure is:

Όταν + clause, main clause

More specifically:

• Όταν μιλάω ελληνικά με τη φίλη μου = when I speak Greek with my friend
• είμαι πιο χαρούμενος = I am happier

So the whole sentence means:

When I speak Greek with my friend, I’m happier.

This is a very useful Greek pattern for expressing:

• when X happens, Y is true
• whenever I do X, I feel Y