42 languages. Zero internet required.

~400 million speakers · the Middle East and North Africa — 25+ countries from Morocco to Oman

Arabic spans dozens of regional dialects, but Modern Standard Arabic is understood across the entire Arab world — and that's what most translation tools target. Rasterdeck Translator handles Arabic speech in both directions entirely on your phone, with no audio ever leaving the device.

~1.1 billion speakers · China, Taiwan, Singapore, and communities worldwide

Mandarin Chinese is the most-spoken first language on Earth, and one of the hardest places to rely on cloud translation — many Western services are slow or blocked entirely behind the Great Firewall. An offline translator sidesteps the problem: there is no connection to block.

~25 million speakers · the Netherlands, Belgium (Flanders), and Suriname

Most Dutch speakers also speak English — until you need a municipal office, a rental contract, or a conversation with someone's grandmother. Rasterdeck Translator covers real Dutch conversation without sending a word of it to a server.

~1.5 billion speakers including second-language · worldwide — the most common second language on Earth

English is the hub language of the engine: every other language pairs with it at maximum quality. If you're an English speaker traveling, or a learner who needs English for work, this is the strongest pairing in the app.

~310 million speakers · France, Canada, Belgium, Switzerland, and most of West and Central Africa

French is an official language in 29 countries — it's as useful in Dakar and Abidjan as in Paris. Rasterdeck Translator speaks it fluently in both directions, offline, with your own voice cloned so a conversation still sounds like you.

~135 million speakers · Germany, Austria, Switzerland, and parts of Belgium and Italy

German bureaucracy is legendary, and it does not speak English. Apartment viewings, Anmeldung appointments, Handwerker visits — this is where an instant spoken translator earns its keep, and where you least want a flaky connection in a concrete government basement.

~600 million speakers · India — the most-spoken language of the subcontinent

Hindi is the world's third-most-spoken language, and India is full of places where mobile data gets patchy fast. An offline translator works on the overnight train, in the Himalayan foothills, and in the village your driver actually comes from.

~65 million speakers · Italy, Switzerland, and San Marino

Italians famously appreciate any attempt at Italian — and conversation there is a contact sport. Speak-and-hear translation keeps the rhythm of an Italian conversation alive in a way that typing into a phone never will, with both speakers' actual voices preserved.

~125 million speakers · Japan

Japanese is consistently rated the hardest major language for English speakers — three writing systems and grammar that reverses everything. It's also a country where English fluency is rarer than visitors expect. Spoken translation running locally on your phone bridges izakaya menus, train mishaps, and actual conversations with people you meet.

~80 million speakers · South Korea and communities worldwide

Korean's alphabet is learnable in a weekend but its speech levels and grammar are not. Rasterdeck Translator handles natural spoken Korean — including the speed at which it's actually spoken — without shipping your conversations to a cloud in another country.

~40 million speakers · Poland and large communities across Europe and North America

Polish consonant clusters terrify learners, and Poland's growing role in European business means more people need it than ever. Speech-to-speech translation handles the pronunciation barrier in both directions, locally, with no audio ever uploaded.

~260 million speakers · Brazil, Portugal, Angola, and Mozambique

Portuguese is the most-spoken language of the southern hemisphere, and Brazilian and European Portuguese diverge enough to trip up basic tools. Rasterdeck Translator covers real spoken Portuguese on-device — useful from Lisbon trams to Brazilian beach towns where data plans die.

~255 million speakers · Russia, Central Asia, the Caucasus, and Eastern Europe

Russian remains the lingua franca across much of Central Asia and the Caucasus — places where Western cloud services can be slow, blocked, or surveilled. A translator that runs entirely on your phone has no traffic to inspect and no service to block.

~560 million speakers · 20+ countries across the Americas and Spain

Spanish is the second-most-spoken native language in the world and the single most useful translation pairing for North American users. Rasterdeck Translator speaks it naturally in both directions — Mexican border towns, Andean villages, Madrid offices — without a data connection anywhere.

~10 million speakers · Sweden and parts of Finland

Swedes switch to flawless English instantly — which is exactly why immigrants and long-term visitors struggle to handle Swedish-only situations: Skatteverket letters, housing queues, healthcare phone lines. Private, offline translation helps where switching to English isn't an option.

~90 million speakers · Türkiye, Cyprus, and communities across Europe

Turkish grammar is agglutinative — single words carry what English needs a sentence for — and it defeats word-by-word translation tools. A proper neural model running on-device handles real spoken Turkish, from Istanbul commerce to Anatolian bus stations.

~85 million speakers · Vietnam and large communities in the US, Australia, and Europe

Vietnamese is a tonal language — the same syllable means six different things depending on pitch — which makes it nearly impossible to fake from a phrasebook. Speech-to-speech translation sidesteps tones entirely: you talk, your phone produces real Vietnamese.

~17 million speakers including second-language · South Africa and Namibia

Afrikaans grew out of Dutch and is one of South Africa's most widely spoken languages, especially across the Western Cape and the platteland. Most translation apps treat it as an afterthought; this one handles real spoken Afrikaans on-device, with nothing leaving your phone.

~270 million speakers · Bangladesh and eastern India (West Bengal)

Bengali is the world's sixth-most-spoken language, and large parts of Bangladesh and rural West Bengal have patchy mobile data. An offline translator works on the ferry, in the village, and anywhere the network drops — without sending your conversations to a server.

~8 million speakers · Bulgaria and communities across the Balkans

Bulgarian is written in Cyrillic and is the oldest documented Slavic language — and outside the big cities, English is far from guaranteed. On-device translation handles real spoken Bulgarian with no connection to block or inspect.

~10 million speakers · Catalonia, Valencia, the Balearic Islands, and Andorra

Catalan is a language in its own right, not a dialect of Spanish, and locals notice the difference. Rasterdeck Translator handles spoken Catalan on-device — useful where Castilian Spanish gets you by but Catalan gets you welcomed.

~11 million speakers · the Czech Republic

Czech has seven grammatical cases and consonant clusters that defeat phrasebooks. A neural model running on your phone handles real spoken Czech in both directions — and keeps working in the castle basement and the night train where data doesn't.

~6 million speakers · Denmark and the Faroe Islands

Danish pronunciation is famously unlike its spelling, which makes it hard to fake from a guide. Spoken translation on-device bridges real Danish situations — and Danes' flawless English doesn't help when you're facing a Danish-only form or phone line.

~1.1 million speakers · Estonia

Estonian is Finno-Ugric — unrelated to its Baltic neighbours and grammatically demanding, with fourteen cases. For the situations Estonia's strong English doesn't cover, a private on-device translator handles real spoken Estonian with nothing uploaded.

~5.5 million speakers · Finland

Finnish is one of Europe's hardest languages for outsiders — fifteen cases and word-building that turns a whole phrase into a single long word. An on-device neural model handles spoken Finnish where a phrasebook can't, fully offline.

~13 million speakers · Greece and Cyprus

Greek uses its own alphabet and, off the main islands, far less English than visitors expect. On-device translation reads and speaks real Greek with no connection — handy where the ferry schedule, the taverna menu, and the village kafeneío are all Greek-only.

~9 million speakers · Israel

Hebrew reads right-to-left and was revived from a liturgical language into a living one in a single century. Rasterdeck Translator handles spoken Hebrew on-device, in both directions, with no audio leaving your phone.

~13 million speakers · Hungary and neighbouring communities

Hungarian is Finno-Ugric — unrelated to the languages all around it — with eighteen cases and a structure word-by-word tools cannot crack. A proper on-device model handles real spoken Hungarian, offline, in both directions.

~350 thousand speakers · Iceland

Icelandic has changed so little in a thousand years that speakers still read the medieval sagas — and it's spoken by fewer people than live in a mid-sized city. For the moments Iceland's excellent English doesn't reach, a private offline translator handles real Icelandic.

~200 million speakers including second-language · Indonesia

Indonesian is the lingua franca of the world's fourth-most-populous country and one of the easier major languages to translate well. Across thousands of islands where coverage is uneven, an offline translator just works — on the boat, on the volcano, in the warung.

~1.8 million who can speak it · Ireland, especially the Gaeltacht regions

Irish is the first official language of Ireland and the living daily language of the Gaeltacht. On-device translation covers Irish text and reads Irish from photos, fully offline, for the places and contexts where it's genuinely used.

~1.5 million speakers · Latvia

Latvian is one of only two surviving Baltic languages, grammatically conservative and preserving features lost elsewhere in Europe. For everything Riga's English doesn't cover, an on-device translator handles real spoken Latvian with nothing uploaded.

~3 million speakers · Lithuania

Lithuanian is the most archaic living Indo-European language — closer in structure to ancient Sanskrit than anything nearby — and famously hard. A neural model on your phone handles real spoken Lithuanian, offline, in both directions.

~25 million speakers · Romania and Moldova

Romanian is a Romance language marooned in a Slavic neighbourhood — Latin at its core, with borrowings from all around it. Outside Bucharest, English is patchy and mobile data patchier; an offline translator covers the gap.

~5 million speakers · Slovakia

Slovak sits between Czech and Polish and rewards anyone who tries it, especially outside Bratislava. On-device translation handles real spoken Slovak in both directions, with no connection needed in the High Tatras or the eastern villages.

~150 million speakers including second-language · Tanzania, Kenya, Uganda, and across East Africa

Swahili is the lingua franca of East Africa — the bridge language across half a dozen countries — and exactly the kind of place where mobile data can't be relied on. A translator that runs entirely on your phone keeps working on safari, on the dhow, and in the village market.

~80 million speakers · Tamil Nadu, Sri Lanka, and Singapore

Tamil is one of the world's oldest living languages, with a literary tradition stretching back two millennia and its own script. On-device translation handles spoken Tamil with no audio leaving your phone — useful where coverage thins outside the cities.

~85 million speakers · Andhra Pradesh and Telangana, southern India

Telugu is the most-spoken Dravidian language and among India's largest by speaker count, written in its own rounded script. A private offline translator handles real spoken Telugu in both directions, working on the train and in the village where the signal drops.

~60 million speakers · Thailand

Thai is tonal and written in its own script with no spaces between words — nearly impossible to fake from a phrasebook. Speak-and-hear translation sidesteps the tones entirely, running on your phone so it works on the island, the night bus, and the street stall.

~40 million speakers · Ukraine and a large global diaspora

Ukrainian is written in Cyrillic and distinct from Russian, and demand for it has never been higher. A translator that runs entirely on your phone has no traffic to intercept and no service to block — private by construction.

~230 million speakers including second-language · Pakistan and northern India

Urdu reads right-to-left in a flowing Perso-Arabic script and is mutually intelligible with spoken Hindi while looking nothing like it on the page. On-device translation handles real spoken Urdu with nothing uploaded, across regions where data is unreliable.

~900 thousand speakers · Wales

Welsh is one of Europe's oldest living languages and is genuinely used day-to-day across much of Wales, with full official status. On-device translation covers Welsh text and reads Welsh from photos, fully offline, for the communities and contexts where it's the first language.