L’ampoule de la cuisine est cassée, alors nous mangeons dans le salon.

Because ampoule begins with a vowel sound, French uses elision: la becomes l’ before a vowel or mute h.

So:

• la cuisine
• l’ampoule

This is very common in French:

• l’école instead of la école
• l’homme instead of le homme

Here, une ampoule means a light bulb.

So L’ampoule de la cuisine means the kitchen light bulb or more literally the bulb of the kitchen.

A learner should know that ampoule can have other meanings in other contexts, but in everyday home vocabulary it very often means light bulb.

Because cuisine is a feminine singular noun: la cuisine = the kitchen.

After de, the article stays as:

• de + la = de la for feminine singular
• de + le = du for masculine singular
• de + l’ = de l’ before a vowel
• de + les = des

So:

• de la cuisine = of/from the kitchen
• not du cuisine, because cuisine is not masculine

In this sentence, L’ampoule de la cuisine is a very natural way to say the kitchen light bulb.

Yes, literally it means of the kitchen. French often uses this structure where English prefers a noun used like an adjective.

Compare:

• l’ampoule de la cuisine = the kitchen light bulb
• la porte du salon = the living-room door
• la table de la salle à manger = the dining-room table

So French often says the bulb of the kitchen, where English says the kitchen bulb/light bulb.

Because cassée is agreeing with l’ampoule, and ampoule is feminine singular.

The basic past participle is:

• cassé for masculine singular
• cassée for feminine singular
• cassés for masculine plural
• cassées for feminine plural

Since the sentence says:

• L’ampoule → feminine singular

we get:

• est cassée

This is the same kind of agreement you see in many French adjective-like forms after être:

• La porte est fermée
• Le livre est fermé

It is originally the past participle of casser (to break), but in this kind of sentence it works very much like an adjective meaning broken.

So:

• L’ampoule est cassée = The bulb is broken

This is a very common French pattern:

• La fenêtre est ouverte = The window is open
• La porte est fermée = The door is closed
• Le verre est cassé = The glass is broken

For a learner, it is often easiest to think of cassée here as broken.

Yes. In real life, when French speakers say L’ampoule est cassée, they often simply mean the bulb is broken or doesn’t work anymore.

English often says:

• The bulb is broken
• The bulb is burnt out
• The light isn’t working

French may use cassée in a broader everyday sense than literal physical breakage. In this sentence, the practical idea is just: the kitchen light bulb isn’t working, so they eat somewhere else.

Because of spelling rules in French.

The verb is manger. Normally, with nous, verbs in -ger add -eons:

• nous mangeons
• nous nageons
• nous voyageons

That extra e keeps the g sounding soft, like in je mange.

Without the e, mangons would suggest a hard g sound, which French does not want here.

It is the present tense: we eat / we are eating.

French present tense often covers both ideas that English separates:

• we eat
• we are eating

So nous mangeons dans le salon can mean:

• we eat in the living room
• we are eating in the living room

In this sentence, because of the context, English would most naturally understand it as we’re eating in the living room.

Yes, many French speakers would very naturally say on mange dans le salon in everyday conversation.

Both are correct:

• nous mangeons = more traditional, more formal, and very standard in writing
• on mange = very common in spoken French

So this sentence is perfectly correct, but in casual spoken French you might hear:

• L’ampoule de la cuisine est cassée, alors on mange dans le salon.

Because dans means in/inside, and that is the normal preposition for being inside a room.

So:

• dans la cuisine = in the kitchen
• dans le salon = in the living room

Au usually comes from à + le, and it is used in other situations, but for rooms in a house, dans is the natural choice when you mean inside that room.

Le salon usually means the living room or lounge.

Depending on the house and the variety of English, translations may include:

• living room
• lounge
• sometimes sitting room

So nous mangeons dans le salon means they are eating in the room used for sitting/relaxing, not in the kitchen.

Here, alors means so, therefore, or as a result.

It links the two ideas:

• The kitchen bulb is broken
• so we are eating in the living room

French alors can also mean then in other contexts, but here it clearly has the sense of so.

The comma helps separate the cause from the result:

• L’ampoule de la cuisine est cassée → situation/cause
• alors nous mangeons dans le salon → consequence

It works much like English punctuation in:

• The kitchen bulb is broken, so we’re eating in the living room.

The comma is natural and helps readability.

In est cassée, the t in est is normally silent because the next word begins with a consonant:

• est cassée → roughly eh ka-say

So you do not say the t sound here.

Also:

• cassée is pronounced roughly ka-say
• mangeons is roughly mahn-zhon
• salon is roughly sa-lon with a nasal vowel at the end

Not very naturally. A word-for-word version would be something like:

• The bulb of the kitchen is broken, so we eat in the living room.

That is understandable, but natural English would usually say:

• The kitchen light bulb is broken, so we’re eating in the living room.

This is a good example of why French and English often use different structures even when the meaning is the same.