Nem mintha viseltes lenne a blúz, csak van rajta egy folt.

It is an idiomatic way to say not as if ... or not that ....

So:

• Nem mintha viseltes lenne a blúz
  = It’s not as if the blouse were worn/shabby = Not that the blouse is worn

In Hungarian, this structure often introduces something the speaker wants to reject or downplay before giving the real issue:

• Nem mintha X lenne, csak Y.
  = It’s not that X is the case, it’s just that Y.

Here, the speaker is saying the problem is not that the blouse is generally worn out; the only problem is that it has a stain.

Because mintha normally goes with the conditional form of the verb.

• van = is
• lenne = would be / were

After mintha, Hungarian often uses a form that corresponds to English as if ... were:

• Mintha beteg lenne. = As if he/she were sick.
• Nem mintha viseltes lenne a blúz... = Not as if the blouse were worn...

Even if English sometimes uses a more everyday translation like Not that the blouse is worn, Hungarian still keeps this lenne form.

Viseltes is an adjective meaning:

• worn
• worn-looking
• shabby from use
• showing signs of wear

For clothing, it usually means the item looks used, old, or no longer fresh-looking.

Important: it does not mean being worn in the sense of someone is wearing it.

• A lány blúzt visel. = The girl is wearing a blouse.
• A blúz viseltes. = The blouse is worn/shabby.

So viseltes describes the condition of the blouse, not the action of wearing it.

This is mostly about word order and emphasis.

Hungarian word order is flexible, and the part placed before the verb area often gets more emphasis or focus.

• viseltes lenne a blúz puts attention on viseltes
• a blúz viseltes lenne is also possible, but the emphasis feels different

In this sentence, the speaker is contrasting two ideas:

• It’s not that it’s worn
• it’s just that it has a stain

So putting viseltes first helps highlight the rejected idea: worn is not the issue.

Here csak means just or only.

• csak van rajta egy folt = it just has a stain on it = there’s only a stain on it

It softens the statement and presents the stain as the real, smaller, more specific issue.

So the contrast is:

• not that the blouse is generally worn out
• just that there is a stain on it

Rajta means on it / on him / on her, depending on context.

Here it means:

• van rajta egy folt = there is a stain on it

Since the noun mentioned is a blúz, rajta clearly means on the blouse.

This is one of the Hungarian pronoun-like location forms:

• rajtam = on me
• rajtad = on you
• rajta = on him/her/it
• rajtunk = on us
• rajtatok = on you all
• rajtuk = on them

So Hungarian often uses this kind of form instead of a separate word like English on it.

Both are possible, but they are structured a little differently.

• Van rajta egy folt. = There is a stain on it.
• Egy folt van a blúzon. = There is a stain on the blouse.

The version in your sentence is very natural because rajta directly refers back to a blúz. It avoids repeating the noun.

So after already mentioning a blúz, Hungarian naturally says:

• van rajta egy folt
  rather than repeating
• van a blúzon egy folt

Both are correct; the chosen version is simply smoother in context.

Egy here means a / one.

• egy folt = a stain

Hungarian has both:

• a/az = the
• egy = a/an

So:

• a blúz = the blouse
• egy folt = a stain

The blouse is specific, so it gets a. The stain is being introduced as new information, so it gets egy.

Folt usually means a spot, stain, or patch-like mark.

In the sentence van rajta egy folt, the most natural meaning is:

• there’s a stain on it
• or there’s a spot on it

The exact English word depends on context:

• on clothing: often stain
• on a surface: possibly spot or mark
• in sewing: sometimes patch

Here, because we are talking about a blouse, stain is the most likely translation.

Yes. This structure sounds more nuanced and conversational than a blunt statement.

Compare:

• A blúz nem viseltes, csak foltos.
  = The blouse isn’t worn, just stained.

This is direct.

• Nem mintha viseltes lenne a blúz, csak van rajta egy folt.
  = It’s not as if the blouse were worn; it just has a stain on it.

This sounds softer and more careful. The speaker is managing the listener’s impression, almost like saying:

• I don’t mean the blouse is in bad condition or anything — it just has one stain.

So this pattern is common when the speaker wants to correct a possible misunderstanding gently.

Yes:

• Nem = not
• mintha = as if / as though
• viseltes = worn, shabby
• lenne = were / would be
• a blúz = the blouse
• csak = just / only
• van = there is / is
• rajta = on it
• egy folt = a stain / a spot

Very literal order:

• Not as if worn were the blouse, just there is on it a stain.

Natural English:

• It’s not as if the blouse were worn; it just has a stain on it.