Κάνω δίαιτα γιατί θέλω να τρώω πιο πολλά φρούτα και λιγότερα γλυκά.

Greek often leaves out the subject pronoun when it is already clear from the verb ending.

So:

• κάνω = I do / I make
• θέλω = I want
• τρώω = I eat / I am eating

Because the endings already show first person singular, Greek does not need εγώ unless the speaker wants emphasis or contrast.

So Εγώ κάνω δίαιτα is possible, but it would sound more like I’m the one dieting or I am dieting.

This is a very common Greek expression. Literally, κάνω means do / make, and δίαιτα means diet, but together κάνω δίαιτα means:

• I’m on a diet
• I’m dieting

Greek often uses κάνω with nouns to make everyday expressions. It is just the natural way to say this idea.

Yes. Γιατί can mean both:

• because
• why

The meaning depends on context and punctuation.

Here it means because, since it introduces the reason:

• Κάνω δίαιτα γιατί θέλω... = I’m dieting because I want...

As a question, it would mean why:

• Γιατί κάνεις δίαιτα; = Why are you dieting?

Notice that Greek uses the Greek question mark ;.

Modern Greek does not use an infinitive the way English does. So after a verb like θέλω (I want), Greek normally uses:

• θέλω να + verb

So:

• θέλω να τρώω = I want to eat

The word να introduces the following verb. For English speakers, it is often easiest to think of να + verb as the normal Greek way to express what English often does with an infinitive.

This is about aspect, which is very important in Greek.

• τρώω is the imperfective form: it suggests repeated, ongoing, or habitual eating.
• φάω is the perfective form: it suggests a single whole action, or eating something in one complete event.

In this sentence, the speaker is talking about a general habit or lifestyle change:

• I want to eat more fruit and fewer sweets in general

So τρώω is the natural choice.

Compare:

• Θέλω να τρώω πιο πολλά φρούτα. = I want to eat more fruit in general / regularly.
• Θέλω να φάω ένα μήλο. = I want to eat an apple now / once.

Yes, both are possible.

• πιο πολλά φρούτα
• περισσότερα φρούτα

Both mean more fruit.

A useful way to think about them:

• πιο πολλά is the more analytic pattern, literally something like more many
• περισσότερα is a single comparative form meaning more

Both are natural Greek. In everyday speech, πιο πολλά is very common.

The same idea applies to λιγότερα γλυκά = fewer / less sweets.

Because they agree with the nouns they describe.

Both φρούτα and γλυκά are:

• neuter
• plural

So the words describing them must also be in the neuter plural form:

• πολλά φρούτα
• λιγότερα γλυκά

This agreement is similar to how adjectives work elsewhere in Greek.

Also, for neuter plural nouns, the nominative and accusative forms are the same, so you see φρούτα and γλυκά in this form even though they are the objects of τρώω.

Because the sentence is talking about things in a general, nonspecific way.

• πιο πολλά φρούτα = more fruit / more fruits
• λιγότερα γλυκά = fewer sweets

Greek often omits the article when speaking generally about plural or mass-type objects, especially after words of quantity like more, less, many, few, and so on.

If you added articles, it would sound more specific, like you meant particular fruits or particular sweets.

Here γλυκά means sweets, desserts, or sweet things.

It comes from the adjective γλυκός / γλυκιά / γλυκό meaning sweet, but Greek often uses adjective forms as nouns when the meaning is clear.

So:

• γλυκά can mean sweet foods, desserts, candies, depending on context.

In this sentence, it simply means the speaker wants to eat fewer sweet foods.

The given word order is the most natural and neutral one:

• Κάνω δίαιτα γιατί θέλω να τρώω πιο πολλά φρούτα και λιγότερα γλυκά.

Greek word order is more flexible than English, but changes often add emphasis or a different rhythm.

For example, you could move things around in some contexts, but the original version is the straightforward way to say it.

Inside the phrase:

• πιο πολλά φρούτα
• λιγότερα γλυκά

the quantity word normally comes before the noun, just as in English.

Και means and.

It links the two parallel ideas:

• πιο πολλά φρούτα = more fruit
• λιγότερα γλυκά = fewer sweets

So the structure is:

• I want to eat more fruit and fewer sweets

This is a very common Greek pattern: one verb followed by two coordinated objects or object phrases.