Valójában otthon maradok.

Hungarian often leaves out subject pronouns when they are clear from the verb ending.

Here, maradok already means I stay / I am staying, because the -ok ending marks first person singular. So:

• maradok = I stay
• én maradok = I stay too, but with extra emphasis on I

You would usually add én only if you want contrast or emphasis, for example: Én otthon maradok, nem ő. = I’m staying home, not him/her.

Valójában means actually, in fact, or really in the sense of in reality.

That is important, because English actually can sometimes be used in ways that do not match Hungarian valójában exactly. Hungarian valójában is specifically about what is true in reality.

Examples:

• Valójában nincs időm. = Actually / In fact, I don’t have time.
• Valójában otthon maradok. = Actually, I’m staying home.

So yes, it often matches English actually, but specifically in the in reality / as a matter of fact sense.

Here otthon means at home.

It functions like an adverb of place, not like a direct noun object. So in this sentence:

• otthon maradok = I stay at home / I’m staying home

English often says stay home without at, but Hungarian normally uses otthon.

A useful comparison:

• haza megyek = I’m going home
• otthon vagyok = I’m at home
• otthon maradok = I’m staying at home

Maradok comes from the verb marad, meaning to stay, to remain, or to be left depending on context.

In this sentence, it means I stay or I am staying.

Breakdown:

• marad = base verb stem / dictionary form
• -ok = I ending

So:

• maradok = I stay
• maradsz = you stay
• marad = he/she/it stays

In this sentence, the natural English translation is usually I’m staying home or I’m staying at home.

Yes, Hungarian word order is flexible, and different orders can sound more neutral or more emphatic.

Valójában otthon maradok is a very natural order. It sounds like:

• Actually, I’m staying home.

Here:

• Valójában sets the overall tone: actually / in fact
• otthon gives the location
• maradok is the verb

You could also hear:

• Otthon maradok, valójában — possible, but less natural in most everyday contexts
• Maradok otthon — also natural, with a slightly different flow
• Valójában én maradok otthon — stronger emphasis on I

So the original sentence is a normal, neutral way to say it.

Grammatically, maradok is present tense, but Hungarian present tense can sometimes refer to the future if the context makes that clear.

So maradok can mean:

• I stay
• I am staying
• sometimes I will stay

For example:

• Ma otthon maradok. = I’m staying home today.
• Holnap is otthon maradok. = I’ll stay home tomorrow too.

In your sentence, without extra time words, the most natural understanding is present: Actually, I’m staying home.

This is a very useful distinction.

• otthon vagyok = I am at home
• otthon maradok = I stay at home / I remain at home

So:

otthon vagyok describes your current location.

otthon maradok suggests staying instead of going somewhere else, or remaining at home.

Examples:

• Most otthon vagyok. = I’m at home now.
• Ma este otthon maradok. = I’m staying home tonight.

So maradok has the idea of remaining or not leaving.

Yes, it is worth learning them separately.

Both can often relate to at home, but they are not always identical.

• otthon = at home, often in a general sense
• itthon = here at home, from the speaker’s point of view; it can also mean in this country

Examples:

• Otthon maradok. = I’m staying at home.
• Itthon maradok. = I’m staying here / staying at home.

In many everyday situations, both are possible, but itthon feels more tied to the speaker’s immediate place or here perspective.

Yes, that is very common.

Words like valójában often appear near the beginning of the sentence because they comment on the whole statement. In English, we also often do this:

• Actually, I’m staying home.
• In fact, I’m staying home.

So putting valójában first is natural because it frames everything that follows.

You can think of it as a sentence-level adverb:

• Valójában
  • the rest of the statement

That makes the sentence easy to process and sounds idiomatic.

A rough English-friendly pronunciation guide would be:

VAW-loy-aa-ban OT-thon MAW-ra-dok

A few important notes:

• á is a long vowel, somewhat like a longer a
• ó is also long
• j in Hungarian sounds like English y
• tt and th do not work like English th; in otthon, the tth cluster is pronounced with t sounds, not like this or think

More carefully:

• Valójában ≈ va-loy-aa-ban
• otthon ≈ ot-thon
• maradok ≈ ma-ra-dok

The stress in Hungarian is always on the first syllable of each word:

• VAlójában
• OTthon
• MAradok