Ovaj jogurt je previše kiseo za mene.

Because jogurt is a masculine singular noun in the nominative case, and the demonstrative must agree with it.

So you get:

• ovaj jogurt = this yogurt
• ova juha = this soup
• ovo mlijeko = this milk

So ovaj is the masculine singular nominative form.

Yes. Jogurt is a masculine noun.

A useful clue is that many Croatian nouns ending in a consonant are masculine, and jogurt follows that pattern. Because it is masculine, other words linked to it also appear in masculine forms, such as:

• ovaj jogurt
• jogurt je kiseo

Because adjectives in Croatian agree with the noun in gender, number, and case.

Here, jogurt is:

• masculine
• singular
• nominative

So the adjective is also masculine singular nominative: kiseo.

Compare:

• Ovaj jogurt je kiseo. = masculine
• Ova juha je kisela. = feminine
• Ovo mlijeko je kiselo. = neuter

Even after je, the adjective still agrees with the subject.

This is just how this adjective changes. Its masculine singular nominative form is kiseo, but in many other forms the stem appears as kisel-.

For example:

• kiseo = masculine singular nominative
• kisela = feminine singular nominative
• kiselo = neuter singular nominative
• kiselog = masculine/neuter genitive singular

So it may look slightly irregular at first, but it is a normal Croatian adjective pattern.

Je is the 3rd person singular present form of biti = to be, so here it means is.

Croatian je is a clitic, which means it usually goes near the beginning of the clause, often in second position.

So:

• Ovaj jogurt je previše kiseo za mene.

The first unit is Ovaj jogurt, and then the clitic je comes after it.

This second-position behavior is very common in Croatian.

Here previše means too much or, with an adjective, simply too.

So:

• previše kiseo = too sour

It strengthens the adjective in a negative or excessive way.

Compare:

• vrlo kiseo = very sour
• dosta kiseo = quite sour
• previše kiseo = too sour

So previše is not just strong emphasis; it means the amount is more than desirable.

Za mene literally means for me, and in this sentence it means something like for my taste or as far as I am concerned.

Croatian often uses za + accusative for this kind of meaning:

• za mene = for me
• za njega = for him
• za nas = for us

So previše kiseo za mene means too sour for me.

It makes the sentence sound more personal and subjective: maybe someone else would find the yogurt fine, but you find it too sour.

Yes, very often you can.

Natural alternatives include:

• Meni je ovaj jogurt previše kiseo.
• Ovaj jogurt mi je previše kiseo.

These also mean that the yogurt is too sour from your point of view.

A simple way to feel the difference is:

• za mene = more clearly for me / for my taste
• meni / mi = more like to me / in my opinion / it feels too sour to me

In everyday speech, all of these can be natural depending on style and emphasis.

Yes. Croatian word order is fairly flexible, although clitics like je and mi still follow their own placement rules.

You can say, for example:

• Ovaj jogurt je previše kiseo za mene.
• Za mene je ovaj jogurt previše kiseo.
• Meni je ovaj jogurt previše kiseo.
• Ovaj jogurt mi je previše kiseo.

These all express roughly the same idea, but the emphasis changes a bit.

For example:

• Za mene... highlights for me
• Ovaj jogurt... highlights this yogurt
• Meni... highlights my personal opinion

Yes. Prekiseo is a very natural one-word alternative meaning too sour or overly sour.

So you could also say:

• Ovaj jogurt je prekiseo za mene.

That is shorter and very idiomatic.

Both are correct:

• previše kiseo = too sour
• prekiseo = too sour / overly sour

For a learner, previše kiseo is often easier to understand because the meaning is more transparent.

Because after je, Croatian normally uses the predicative form kiseo.

So:

• Jogurt je kiseo. = correct and natural

You will often see kiseli before a noun, for example:

• kiseli krastavci

In practice, the important thing for a learner is this:

• after je: kiseo
• before the noun, you may encounter kiseli in certain uses

So in this sentence, kiseo is the expected form.

Yes. For food and drink, kiseo is the normal word for sour.

With yogurt, fruit, soup, milk products, and similar things, kiseo is exactly the word you would expect.

In other contexts, it can sometimes also mean acidic, but here the meaning is clearly about taste.

Yes.

• Jogurt je previše kiseo. = Yogurt is too sour.
• Ovaj jogurt je previše kiseo. = This yogurt is too sour.

Adding ovaj makes it specific.

You can also omit za mene:

• Ovaj jogurt je previše kiseo.

That sounds more general or objective. Adding za mene makes it clear that this is your personal judgment.