May isa pang paso sa bintana, at gusto ni Lola ang halamang iyon.

May is an existential word. It usually means there is, there are, or has, depending on the context.

So May isa pang paso sa bintana means There is another pot on/by the window.

Filipino often uses may instead of a separate verb like English there is.

Example:

• May libro sa mesa. = There is a book on the table.

Because Filipino does not always need a separate verb like English is in this kind of sentence.

The pattern may + noun phrase + location already expresses existence:

• May paso sa bintana. = There is a pot at the window.

So may is doing the job that English often expresses with there is.

Isa means one, and pang here gives the sense of another, one more, or an additional.

So:

• isa pang paso = another pot / one more pot

This is different from:

• isang paso = one pot

So pang adds the idea of addition.

Because isang is isa linked directly to the noun:

• isang paso = one pot

But when you insert pang, the structure changes:

• isa pang paso = one more pot

Here, pang belongs with isa to make the meaning another/one more, so isa pang paso is the natural form.

Sa is a very common location marker. It can correspond to English in, on, at, to, by, and similar prepositions, depending on context.

So sa bintana can mean:

• at the window
• by the window
• sometimes on the windowsill, depending on what is meant

Filipino is often less specific than English about location prepositions, and context tells you the best translation.

Here paso means a plant pot or flowerpot.

That meaning is clear because the second clause mentions halaman meaning plant:

• gusto ni Lola ang halamang iyon = Grandma likes that plant

So the paso in the first clause is naturally understood as a pot containing a plant.

At means and.

It connects the two clauses:

• May isa pang paso sa bintana
• at gusto ni Lola ang halamang iyon

So the whole sentence is joining two related ideas.

Gusto can mean either like or want, depending on context.

In this sentence, it is most naturally understood as like:

• Gusto ni Lola ang halamang iyon. = Grandma likes that plant.

If the context were about asking for or choosing something, gusto could mean want instead.

Ni is the marker used for a personal name when that name is in a non-ang role, such as the experiencer in a gusto sentence.

So:

• ni Lola = by/of Grandma in form, but here it functions as Grandma in Grandma likes...

Compare:

• Si Lola ay masaya. = Grandma is happy.

In that sentence, si Lola is the main topic marked with si.

With gusto, the common pattern is:

• Gusto + ni/ko/mo/etc. + ang phrase

Example:

• Gusto ko ang librong ito. = I like this book.

Because ang marks the specific thing being referred to in this sentence.

Here, ang halamang iyon means that plant, a definite and specific plant.

With gusto, this contrast is useful:

• Gusto ni Lola ang halamang iyon. = Grandma likes that specific plant
• Gusto ni Lola ng halaman. = Grandma wants/likes a plant / plants more generally

So ang makes the noun phrase more definite and specific.

Because Filipino uses a linker between a noun and a modifier.

Here:

• halaman = plant
• iyon = that

To connect them naturally, Filipino adds the linker:

• halamang iyon = that plant

So halamang is basically halaman plus the linker.

This linker is very common in Filipino:

• magandang bahay = beautiful house
• malaking aso = big dog

Iyon means that.

The basic set is:

• ito = this near the speaker
• iyan = that near the listener
• iyon = that farther away

So halamang iyon means that plant, usually one not near the speaker.

In everyday speech, iyan and iyon are sometimes used a bit flexibly, but that is the basic distinction.

Yes, it is very normal.

A common Filipino pattern is:

• gusto + experiencer + ang-marked thing

So:

• Gusto ni Lola ang halamang iyon

Literally, it is something like:

• Likes Grandma that plant

But in natural English, you translate it as:

• Grandma likes that plant

So even though the order is different from English, the Filipino sentence is perfectly standard.