kabegami wo erabu.

It is read:

かべがみ を えらぶ

• 壁紙 = かべがみ
• を = pronounced o
• 選ぶ = えらぶ

So the whole sentence is:

かべがみをえらぶ

In normal Japanese writing, it would usually be written without spaces: 壁紙を選ぶ

を marks the direct object of the verb.

In this sentence:

• 壁紙 is the thing being chosen
• 選ぶ means to choose
• so 壁紙を選ぶ means choose wallpaper / to choose wallpaper

A very literal breakdown is:

• 壁紙 = wallpaper
• を = object marker
• 選ぶ = choose

English uses word order to show this, but Japanese often uses particles like を to show the role of a word in the sentence.

Because Japanese typically puts the verb at the end of the sentence.

So instead of English order:

• choose wallpaper

Japanese uses:

• wallpaper + object marker + choose
• 壁紙を選ぶ

This verb-final pattern is one of the most important differences between Japanese and English.

選ぶ is the dictionary form (also called the plain form).

This form is commonly used in:

• dictionaries
• casual speech
• headings
• labels
• instructions
• neutral written descriptions

選びます is the polite form.

So:

• 壁紙を選ぶ = plain / neutral
• 壁紙を選びます = polite

If this appears on a menu, button, app screen, or lesson example, the plain form is very common.

The subject is not stated.

Japanese often leaves out the subject when it is clear from context. So 壁紙を選ぶ could mean:

• I choose wallpaper
• you choose wallpaper
• someone chooses wallpaper
• to choose wallpaper

The exact subject depends on the situation.

This is very normal in Japanese. Unlike English, Japanese often omits words that can be understood from context.

Not always. 壁紙 can mean:

• wallpaper for a room or wall
• desktop/phone wallpaper in digital contexts

So the meaning depends on where you see it.

For example:

• in a home design context, 壁紙 probably means wall covering
• in a phone or computer menu, 壁紙 probably means screen wallpaper

Yes, it can be, depending on context.

Japanese often allows short sentences like this, especially when the subject is omitted.

It can also feel like:

• a plain statement: (Someone) chooses wallpaper
• a dictionary-style expression: to choose wallpaper
• an instruction or menu label: Choose wallpaper

So even though it may feel incomplete to an English speaker, it is perfectly natural in Japanese in the right context.

The spaces are probably included for learners.

Normally, Japanese is written like this:

壁紙を選ぶ

Japanese does not usually use spaces between words the way English does. Textbooks and beginner materials sometimes add spaces to make the structure easier to see.

Here is the breakdown:

• 壁紙 = noun
• を = particle
• 選ぶ = verb

More specifically:

• 壁紙 is the object
• を marks it as the object
• 選ぶ is the action

So the pattern is:

noun + を + verb

This is a very common Japanese sentence pattern.

Yes, it can help to notice the parts:

• 壁 = wall
• 紙 = paper
  So 壁紙 literally looks like wall-paper, which makes it easy to remember.

For 選ぶ:

• 選 is the kanji meaning select / choose
• ぶ is the hiragana ending

Many Japanese verbs are written with:

• a kanji for the core meaning
• hiragana for the ending

This is very common in Japanese verbs.

Yes, depending on the nuance.

For example:

• 壁紙を選ぶ = choose wallpaper
• 壁紙を決める = decide on wallpaper
• 壁紙を変える = change the wallpaper

These are similar, but not identical:

• 選ぶ focuses on choosing from options
• 決める focuses on making the decision
• 変える focuses on changing it to something else

So 選ぶ is the best match when the action is specifically selecting wallpaper.