A guest is coming to preach, and they do not preach in your congregation's language. Here is how a church prepares the room so everybody follows the whole sermon live, in their own language, on the phone in their hand, and what to do about the names and terms that trip up any translation.
The invitation has gone out and the date is in the calendar. A pastor from your partner church abroad is coming to preach, or a missionary your church has supported for years is home for a few weeks, or a speaker is passing through on the way to a conference. Everybody is glad. Then somebody at the leadership meeting asks the practical question: how will the congregation understand them?
This guide is for that meeting. It covers the usual answer and what it costs, how live translation on phones changes it, how to prepare the room and the sound, and how to handle the names and terms that trip up any translation, human or not.
Most churches reach for an interpreter standing beside the preacher, sentence by sentence. It is a real gift when it works, and many churches have someone who serves this way faithfully. If you do, keep them. Nothing in this guide is meant to take that ministry away.
But everybody who has sat through an interpreted sermon knows what it costs. The sermon takes twice as long, or the preacher cuts half of it to fit the time. Every story is broken into pieces. A joke lands twice, or not at all. The preacher has to stop after every sentence and wait, which is not how anybody preaches, so the guest you invited for their voice spends the morning sounding like somebody else. And it only works when someone in the church speaks the guest's language well, knows the Bible in both languages, and is free that Sunday.
With MulingStream the guest preaches the way they always preach, in their own language, without stopping. The congregation follows on the phones already in their pockets, in the congregation's own language: they read the translation as text, or listen to a voice with an earbud. The translation arrives a few seconds behind the preacher, so the room stays with the sermon instead of waiting for it.
For a member it takes three steps, and no app:
There is no account to create and nothing to install. Each person sets the text size and the volume on their own phone, so the older member who needs large letters and the teenager who wants the voice quieter both get what they need without changing anything for anybody else. You can read more about the guest's side on how it works for listeners.
A guest preacher Sunday goes well when the decisions are made on Wednesday, not at five to ten on Sunday morning. Here is what we suggest.
Set the room to the guest's language. The room needs to know which language is being spoken, so set it to the language your guest will preach in, and add your congregation's language as the one people follow in. If some members speak a third language at home, add that too: the same sermon reaches them in theirs at the same moment.
Start the room when the guest steps up. Your own worship leader and the announcements are already in the congregation's language, and nobody needs them translated. Press start as the guest comes to the front, and stop when they sit down.
Give the room clean sound. The best signal comes from the sound desk: one cable from the desk into the laptop that runs the room, carrying the guest's microphone. If you keep an interpreter on stage as well, send only the guest's microphone to the room, so the translation follows the preacher and not both voices. More on the sound and media side.
Try it before Sunday. If the guest arrives early, ask for five minutes at the lectern on Saturday, and ask two or three people from the welcome team to join on their phones and tell you what they see. If the guest is not there yet, a member who speaks the language can read a passage in their place.
Watch the joins. While the room is running, the speaker's screen shows who joins and which language they chose, so the person at the sound desk can see at a glance that people are in and following. Members who join early see that the room has not started yet, rather than an empty screen.
Tell people how, once. Put the code on the screen during the welcome and in the bulletin, and post the link in the church group chat on Saturday. One sentence from the front is enough: "Our guest will preach in Portuguese. Scan the code on the screen to follow in Danish on your phone." Ask people to bring earbuds if they would rather listen than read; the text is silent, so nobody needs them to follow.
Think about the people without a phone. Some members will not have one with them, or would rather not hold one through a sermon. Seat them beside someone who is reading along, and if you have an interpreter, let the interpreter serve them.
The guest you invited for their voice should be able to preach in it.
Names are where any live translation stumbles first. The guest's home church, the town they come from, the people in their stories, the ministry they lead: none of these is in a dictionary, so a translation has to guess, and a guess on a name stands out.
A few things help a great deal:
Ask the guest for a short list of the names and places they plan to mention, and put the important ones on a slide during the sermon. A reader who sees an odd spelling can glance up and recognise it. Ask the guest to read verses aloud rather than only naming the reference. "John 3:16" on its own tells a listener a book and a number; the words are what they came for. Ask about the words of their tradition. Every church has terms that mean something particular there: the name of a ministry, a phrase their congregation says every week. If you know them in advance, a line in the bulletin explains them before they come up. Tell the congregation it is live. People who know the translation is happening as the guest speaks will forgive a misheard name and stay with the sermon.
A guest preacher is a gift to a congregation: a window onto the church in another place. When the whole sermon reaches the room in one piece, people hear the guest's own stories, timing and warmth, and the guest preaches the sermon they prepared rather than half of it. Afterwards, over coffee, the conversation is about what was said, not about how hard it was to follow.
And the room you prepared serves every other Sunday too: the next guest, the visiting family, the member whose first language is not the congregation's.
Since 17 February 2026, a room can hold a list of keywords: the names, places and terms that must never be guessed at. Add the guest's name, their home church, the town they come from and the people in their stories before the service, and they come through as said, in every language. The slide is still a kind touch, but it is no longer a rescue. Read more on the keywords page.
Since 19 March 2026, the translation follows what the preacher means in context, rather than going word by word, so a story told with feeling comes through as a story. On the same day we released Smart Hints: when the guest quotes or names a verse, the listener sees it from a widely used Bible translation in their own language, and a saying that does not travel gets a short note underneath. Reading verses aloud still helps; it is no longer the only way the words get through. The whole story is in Smart Hints: when the words arrive but the meaning does not.
Since 2 April 2026, Context Enhancer lets you give the room the guest's topic, the passage, the names and the phrases before the service. A good interpreter always asks for the notes first. This is the same conversation, and it takes about a minute.
A guest preacher Sunday is the one Sunday when the whole room needs the translation, not a few guests. Since 7 April 2026, MulingDisplay puts it on the church screen as live captions, so the member without a phone and the one who would rather not hold one read along with everybody else. Phones keep working beside it.
Many churches keep their interpreter at the guest's side and offer the phones for everyone else. Since 15 July 2026, a room has a setting called Live Interpreter on Stage. Turn it on when a person on stage repeats the speaker in another language: the room recognises the repeat and skips it, so the people following on their phones hear each thing once. Sending only the guest's microphone to the room still gives the cleanest result.
You can hear what your congregation would hear, at any hour: open the listener demo room on your phone and choose a language. For the people who will run it, read how it works for leaders.
We show you the whole thing live, in about fifteen minutes. Nothing is decided on the call and nothing follows it: you see it, and then you are the judge.