La questione riguarda solo questa strada.

Because questione is a feminine singular noun, and in Italian it normally takes the definite article when you are talking about a specific issue: la questione = the issue / the matter.

Italian uses articles more often than English does, especially with abstract nouns and when the thing being discussed is understood from context.

• la questione = the issue
• una questione = an issue / a question / a matter

So here la tells you it is a specific, known issue.

Here riguarda means concerns, has to do with, or regards.

It comes from the verb riguardare.

• riguardare = to concern / to regard
• riguarda = it concerns / concerns

In this sentence, the subject is la questione, so riguarda is third person singular present:

• la questione riguarda = the issue concerns

A learner may notice that guardare means to look, but riguardare is a separate verb with the common meaning to concern.

Because riguardare is a transitive verb in this meaning, so it takes a direct object with no preposition.

So:

• riguardare qualcosa = to concern something
• riguardare qualcuno = to concern someone

That is why you say:

• La questione riguarda questa strada.

and not:

• La questione riguarda di questa strada. ✘

This is similar to English concern:

• The issue concerns this road.

You do not say concerns about this road in this structure.

Because solo is limiting questa strada. It means the issue concerns only this road, and not others.

So:

• riguarda solo questa strada = it concerns only this road

Placing solo right before what it limits is very common in Italian.

You may also hear:

• La questione riguarda questa strada soltanto.

That means almost the same thing, with soltanto sounding a bit more formal or emphatic.

Yes, but the emphasis may change slightly.

Compare:

• La questione riguarda solo questa strada.

  • The most natural version here.
  • Emphasis: only this road

• La questione solo riguarda questa strada.

  • Much less natural in ordinary Italian.

• Solo la questione riguarda questa strada.

  • This would mean something different, roughly only the issue concerns this road, which is probably not what you want.

So in this sentence, solo questa strada is the best and clearest placement.

Because strada is a feminine singular noun, and the demonstrative must agree with it.

• questo = masculine singular
• questa = feminine singular
• questi = masculine plural
• queste = feminine plural

Since strada is feminine singular:

• questa strada = this road / this street

Other examples:

• questo libro = this book
• questa casa = this house
• queste strade = these roads

Strada can mean either road or street, depending on context.

So questa strada could be:

• this road
• this street

If the meaning has already been shown to the learner, then the context probably makes clear which is better in English. Italian strada is often a broader word than English street.

No. This is a very common point of confusion.

• domanda = question, in the sense of something you ask
• questione = issue, matter, problem, question in the sense of a topic under discussion

So here la questione does not mean someone is asking a question. It means the issue / the matter.

For example:

• Ho una domanda. = I have a question.
• È una questione importante. = It is an important issue.

Sometimes yes, but the nuance changes.

• la questione = the issue / the matter
• il problema = the problem

Questione is more neutral. It just says there is a matter being discussed. Problema clearly suggests something negative or difficult.

So:

• La questione riguarda solo questa strada. = The matter concerns only this road.

• Il problema riguarda solo questa strada. = The problem concerns only this road.

Both are grammatical, but they do not feel exactly the same.

It is pronounced roughly ree-gwar-da.

A few helpful points:

• the ri- sounds like ree
• gua sounds like gwa
• stress falls on -guar-: ri-GUAR-da

So:

• riguarda → ri-GUAR-da

And the full sentence is pronounced roughly:

• La kwes-TYO-ne ri-GWAR-da SO-lo KWES-ta STRA-da

That is only an approximation, but it can help an English speaker get started.

It is perfectly normal and natural Italian. It sounds fairly neutral, maybe slightly formal because of la questione, but not unnaturally formal.

In everyday speech, someone might also say:

• Il problema riguarda solo questa strada.
• La cosa riguarda solo questa strada.

But the original sentence is completely standard and natural.