Most writing systems grew slowly and nobody knows quite who started them. Cyrillic is different. It was made on purpose, in the ninth century, by people who wanted a Slavic congregation to hear scripture and the liturgy in the language they actually spoke. If you have ever wondered whether translating a service is a modern idea, this is the answer.
The short version, and it is genuinely a church story rather than a national one.
In the ninth century two brothers from Thessaloniki, Cyril and Methodius, were sent to preach among Slavic speakers. They hit the problem every missionary hits: the people could not read the scriptures, because the scriptures were not in their language, and their language was not written down.
So the brothers made an alphabet for it, and began translating scripture and the liturgy into it. The alphabet they devised is called Glagolitic. The one now called Cyrillic developed afterwards, among their students, and took its name from Cyril. Those students were received in the Bulgarian empire after their mission ran into opposition elsewhere, and the writing tradition took root there.
The language they wrote, now called Old Church Slavonic, became a liturgical language used across a large part of eastern Europe for centuries. Bulgaria still keeps a day in May for the alphabet and the culture built on it, which makes it one of the very few countries in the world that holds a public celebration of its own letters.
Worth saying plainly. The argument that people should hear the faith in their own language, rather than in a prestigious language they do not speak, is not a modern convenience. It is old, it was contested, and somebody made an alphabet to win it.
Practical, and worth two minutes if Bulgarian is going on your projector rather than only on phones.
Cyrillic letterforms sit taller and heavier than Latin ones at the same font size, and lines packed too closely start to look like a wall. Our captions allow for it rather than squeezing Bulgarian into a layout designed for English.
В is a v, Р is an r, С is an s, Н is an n, У is a u. If you try to sanity check a Bulgarian caption with Latin instincts you will misread it confidently. Do not proofread it yourself. Ask a Bulgarian.
Handwritten and italic Cyrillic look startlingly unlike the printed forms, which is why a decorative italic font can make a caption unreadable to the very person it is for. We keep captions in a plain upright face for exactly this reason.
All three directions are live today.
A Bulgarian speaker can preach in Bulgarian and the room follows in its own languages. Bulgarian is one of the 81 languages that can be the source.
Bulgarian in Cyrillic on a guest's own phone while you speak. No app, no account, nothing to install on their side.
A Bulgarian voice in one earbud, male or female, chosen by the listener rather than handed to them.
MulingStream works with 183 languages. 80 can be spoken from the stage, 182 can be read as captions, 81 can be heard as a voice. Adding a language never changes what a gathering costs.
Unedited output from the same translation path a live room uses, run on 2026-08-06 from a Danish sermon script, eight target languages at once.
Og Ånden faldt over dem alle sammen, og de begyndte at tale på andre sprog.
Acts 2, in Danish
The Danish word carries all three and only the sermon decides which. A tool matching words picks one, and it picks it identically in every language in the room at the same instant. On Pentecost Sunday that is the whole point of the reading, gone, with nobody in the building able to tell you.
И Светият Дух слезе върху всички тях и те започнаха да говорят на други езици.
Светият Дух, the Holy Spirit, named in full rather than left as an ambiguous noun. And слезе, came down, which is the verb Bulgarian scripture uses for this, not a general word for falling. A Bulgarian churchgoer has heard that sentence before.
Lad os ikke gå over åen efter vand. Svaret står lige her i teksten.
An aside, in Danish
A Danish idiom meaning let us not overcomplicate this. Word by word it becomes a sentence about a river in the middle of a point about a Bible passage, and your guest loses the next half minute working out whether the river was a metaphor.
Нека не усложняваме излишно нещата. Отговорът е точно тук в текста.
Let us not needlessly complicate things. The answer is right here in the text. No river, no puzzle, and the second sentence points at the passage exactly as the speaker did. This is the ordinary case: most of what defeats live translation is not doctrine, it is the way people talk.
Both lines came out of the production translation path, not a demonstration built for the website. How the decision is made: Smart Translation.
A second time scripture and the shape of Bulgarian moved together.
A full Bulgarian Bible was printed in Constantinople in 1871, produced by a team that included Bulgarian scholars and foreign missionaries. It is often credited with helping settle the modern literary language, because it was widely read at exactly the moment the written standard was being argued over.
That gives Bulgarian something in common with English and with Czech: a Bible translation that did not only carry the text, it shaped the language people write in. For a church running live translation the consequence is the familiar one. There is a settled biblical register, and a Bulgarian listener knows when a sentence is in it and when it has slipped into everyday speech.
If your reading matters, share it beforehand with Context Enhancer. Knowing which passage you are in is what pulls the right register.
And one thing worth not assuming at the door.
Bulgarian speakers have settled across western and southern Europe over recent decades, usually as households rather than individuals. As with most such communities, the working generation manages the local language and the oldest generation does not.
Turkish and Romani are spoken in Bulgaria too. Guessing wrong at the door is awkward for everybody. Since adding languages costs nothing extra, the safe move is to offer several and let people choose privately on their own phone.
A Bulgarian guest may come from an Orthodox background, an evangelical one, or from no church at all. The vocabulary that feels natural differs, which is another reason to let the translation follow what is actually being said rather than adopt a tradition of its own.
The middle one is the hardest thing in this language to translate into, and almost nobody outside it knows it exists.
The word for "the" is stuck on the end.
A Balkan family trait Bulgarian attaches its definite article to the end of the noun rather than putting a separate word in front. Romanian does the same, despite being a Romance language and not a Slavic one. Neighbours borrow habits from each other, not only words.
The verb says whether you saw it yourself.
Retelling, marked in grammar Bulgarian has verb forms that signal the speaker is reporting something rather than witnessing it. For a preacher retelling a Bible story this is not a technicality: the grammar itself asks whether you were there. It is the sort of decision a word matching tool cannot even see, let alone make.
There is no infinitive.
No plain "to go" Where English says "he wants to go", Bulgarian builds the phrase differently, because it lost the basic form of the verb that other Slavic languages kept. Every sentence with a verb inside a verb has to be rebuilt rather than mapped. Do that word by word and you get something a Bulgarian can decode but would never say.
Yes, on phones and on a projected screen. It needs a little more vertical room than Latin at the same size and our captions allow for it. If you are putting captions on the big screen, MulingDisplay is the page for that.
No. They share an alphabet and a great many roots, and they are different languages with different grammar. Offering somebody the wrong one is worse than offering nothing, because it says you did not look. Add the language they actually speak. It costs no more.
Not reliably, if you do not read Cyrillic, and you will be more confident than you should be because several letters look like Latin ones with other values. Ask a Bulgarian speaker after the service. It takes them ten seconds and it is worth more than any assurance from us.
No. Add Bulgarian, print the code, start. Sharing your outline beforehand helps, and takes a minute, but nothing is required.
Yes. Bulgarian is one of the languages that can be the source, and it runs identically pointed that way.
Each has a hook of its own. The rest of the 183 are a row in the table.
See all 183 languages, with what each one can do.
Nothing to install, no card, and your guests need nothing but the phone in their pocket.