La rentadora és a la cuina, i avui hi rentem la roba.

La is the feminine singular definite article, equivalent to the.

These nouns are grammatically feminine:

• la rentadora = the washing machine
• la cuina = the kitchen
• la roba = the clothes / the laundry

This is grammatical gender, not biological sex. In Catalan, nouns normally take an article, and the article has to agree with the noun’s gender and number.

És is the 3rd person singular present of ser: it is.

In Catalan, ser is very commonly used for simple location, especially when you are just saying where something is:

• La rentadora és a la cuina = the washing machine is in the kitchen

English speakers often expect estar because of Spanish, but Catalan uses ser more widely for location. Estar can appear in some contexts too, but és a la cuina is a very natural neutral way to say it.

Also, the accent matters: és = is, while es without an accent is a pronoun.

Prepositions do not match one-for-one between languages.

In Catalan, a can cover meanings that English expresses with at, in, or sometimes to, depending on context. So:

• és a la cuina literally looks like is at the kitchen
• but it naturally means is in the kitchen

This is normal Catalan usage. You should learn a la cuina as the natural expression here, rather than trying to map a to only one English preposition.

Hi is a locative weak pronoun. It refers to a place that has already been mentioned or is understood from context.

You can often think of it as:

• there
• in that place
• sometimes in it, depending on the context

So hi rentem la roba avoids repeating the place phrase. Catalan uses hi very often where English might just repeat the location or leave it implicit.

Because hi is a clitic pronoun, and in Catalan clitics normally go before a conjugated verb:

• hi rentem

This is the normal pattern with finite verb forms.

By contrast, with an infinitive, gerund, or affirmative imperative, clitics often go after the verb:

• rentar-hi
• rentant-hi
• renta-hi

So in this sentence, hi rentem is exactly what you should expect.

Rentem is the 1st person plural present indicative of rentar:

• jo rento = I wash
• tu rentes = you wash
• ell/ella renta = he/she washes
• nosaltres rentem = we wash
• vosaltres renteu = you all wash
• ells/elles renten = they wash

So rentem means we wash.

In context, Catalan present tense can sometimes be translated in English as:

• we wash
• we are washing

depending on what sounds most natural in English.

Catalan often leaves out subject pronouns because the verb ending already shows who the subject is.

Here, rentem already tells you the subject is we, so nosaltres is unnecessary.

You could say:

• Nosaltres avui hi rentem la roba

but that would usually add emphasis or contrast, something like we are the ones washing the clothes there today.

Because la roba is a collective singular noun in Catalan.

English uses the plural clothes, but Catalan often uses singular roba to refer to clothing or laundry as a whole:

• la roba = clothes / clothing / laundry

So even though the meaning in English may be plural, the Catalan noun is singular, and that is completely normal.

The definite article is natural here because it refers to a specific set of clothes or laundry that is understood in the situation.

So la roba can mean:

• the clothes
• the laundry

Catalan often uses the definite article in places where English may or may not use one. In this sentence, rentem la roba is the most natural way to say we wash the clothes / the laundry.

Avui means today. It adds the time frame for the action.

In this sentence, it appears early in the second clause:

• i avui hi rentem la roba

That placement highlights today a little. Catalan is fairly flexible with adverbs like avui, so you may also see other word orders depending on emphasis, for example:

• Avui hi rentem la roba
• Hi rentem la roba avui

The version in your sentence is very natural.

Not usually.

In Catalan, a comma before i is often omitted, especially in simple coordination. So many writers would also write:

• La rentadora és a la cuina i avui hi rentem la roba.

The comma in your sentence is not wrong, but it is more stylistic than essential. It can mark a pause or separate the two ideas a bit more clearly.