Casaluz — Latin American Spanish for children

Two tracks, one app

Knowing the words and reading them are different skills.

A Spanish-speaking four-year-old knows thousands of words and can read none of them. An adult can sound out perro and have no idea what it means. Casaluz teaches both, in the order they actually happen.

First, the words — by ear.

Nothing to read. A picture, a voice, and a tap. It works from about two, and it never asks a child to recognise a letter before they are ready.

Not just nouns.

Phrases a child actually says — más, ya no, me toca. Opposites, position words, counting, colours, shapes. And the words no picture can carry — y, también, todos, siempre — taught inside spoken sentences, because that is how every child learns them.

Listen and tap: the word puerta spoken, four illustrations to choose from

Every one of the 717 words has its own illustration, including the ones no emoji exists for — piñata, mole, mariachi, alebrije, papel picado, molcajete, nopal.

The voice

One voice. Every word, every sentence, every time.

Most children's language apps hand the text to whatever text-to-speech engine the phone happens to ship. The result changes with the device, mispronounces half the vocabulary, and sounds like a machine — which is precisely the thing a child is trying to copy.

The Casaluz home screen: a Play button, the current learning stage, and the worlds

3,955 clips, rendered once.

Every word, every phrase, every letter sound and every lesson line is an audio clip in one consistent Latin American voice, rendered ahead of time and shipped inside the app — 41 MB of it. It is not a human narrator, and it is not the phone reading text aloud either: it is one voice, produced once, checked, and identical on every device.

Even the sentences it makes up.

The games build sentences a child has never heard before — el perro corre, quiero una manzana, tres gatos. Those are assembled from pieces rendered in that same voice, not read out by the phone, so a made-up sentence sounds like the same voice that taught the words.

Then reading

The letters — the way Latin America teaches them.

Not A, B, C. Spanish is taught by the método silábico: the five vowels first, then M, P, S, L, T — because with those a child reads mamá in the second lesson. Alphabetical order puts M at position thirteen and delays that by months.

The syllable, not the letter name.

A child told that B is called be will read bebé as "be-e-be-e". Every consonant lesson blends instead: mmm… aaa… ¡ma! — then ma me mi mo mu, then a real word the child can now decode.

Only words they have met.

Each lesson ends with Ya puedes leer — words decodable with that lesson and everything before it, and nothing else. That list is the whole point of the sequence.

A world screen showing themes with their illustrations

Lessons

Short lessons that finish.

Thirty-four numbered lessons with a goal you can state in a sentence: say hello and tell someone your name. Name your family. Ask for what you want. Get dressed. Say how you feel. Each one ends with something your child can actually say out loud. The last stage is conversation: the app asks — ¿Qué te gusta comer? — and your child picks their own answer and says it: Me gusta el helado.

Setting up: the child's name, their age, and how much Spanish they hear at home

With their own name in it.

Tell the app what your child is called and lesson one shows Me llamo Sofía — the voice says Me llamo, and your child says their own name. It stays on the phone and is never sent anywhere.

And it knows what comes next.

Tell it their age and how much Spanish they hear at home, and the app opens the right stage and picks what to practise — weighting the words they have missed and leaving the alphabet closed until the vocabulary is there to read with.

Itemised

Everything a first Spanish should carry.

717 ×

Words in Latin American Spanish — carro, papa, jugo, frijol, computadora. Not the Spanish of Spain: no coche, patata or zumo.

717 ×

Original illustrations — one for every word, including the ones no emoji exists for.

3,955 ×

Audio clips in one voice, rendered ahead of time and shipped with the app, working with no connection.

34 ×

Lessons with a stated goal, 397 steps in all, each ending in something the child can say.

28 ×

Letter lessons in método silábico order, each with its sound, its syllable table, and the first real word it unlocks.

36 ×

Phrases a small child actually uses, from más to me toca to ¿me ayudas?

15 ×

Games — listening, comprehension, counting, opposites, position, rhyme, syllables, shapes and sentences.

108 ×

Rhyme families built on real Spanish rhyme, from the stressed vowel onward — so pato rhymes with zapato and never with perro.

14 ×

Function words — y, o, no, pero, también, todos, siempre, nunca — taught inside sentences rather than as flashcards.

Privacy

A children's app that collects nothing.

Not "we take privacy seriously". There is no account to make, no server to send anything to, and no analytics in the app at all.

No account, ever. Nothing to sign up for and no email required to use it.
No analytics, no ads, no tracking. No third-party SDKs that phone home.
Your child's name and progress stay on the phone. Deleting the app deletes them.
It works offline. Every word, picture, recording, game and lesson is inside the app. The only thing it ever fetches is a letter video you choose to download — once, from our own host — and that letter then plays with no connection for good.

Read the full privacy policy →

Your child learns Spanish. Then learns to read it.