Mandarin Sermon Translation · AI for Chinese Churches

Mandarin tones matter and the wrong AI will break them

Mandarin has four tones plus a neutral tone, and the wrong tone produces a different word entirely. 'Shi' (是) means 'is', but mis-toned it could mean 'ten', 'eat', 'corpse', 'time', or 'history'. A mis-toned Mandarin sermon at scale is genuinely incomprehensible. Most generic AI translation platforms produce flat or wrong-toned Mandarin. Acts 2 was trained on the Chinese Union Version (和合本), the most widely used Chinese Bible translation, contemporary preaching from Three-Self churches, house churches, Taiwanese Presbyterian congregations, and the major US/UK/Australia Mandarin diaspora churches. Tonal accuracy is preserved in the cloned voice, which is what separates real Mandarin from confusing noise. Theological vocabulary — 神 (God), 圣灵 (Holy Spirit), 救恩 (salvation), 恩典 (grace) — is handled in the elevated register Mandarin Protestant preaching expects.

Built for Mandarin churches in the West

Mandarin-speaking diaspora churches in the US (Cupertino, Boston, Houston, Seattle), UK (London, Manchester), Australia (Sydney, Melbourne), and Canada (Vancouver, Toronto) face the same multi-generational pattern as every other diaspora community. First-generation members are Mandarin-dominant; ABC (American-born Chinese) and BBC (British-born Chinese) youth are English-dominant; parents code-switch constantly. The classic solution is two services. Acts 2 lets you run one service in your cloned voice with parallel English and Mandarin streams. First-generation members hear 普通话 with proper tones, second-generation youth hear English, and the family stays in one sanctuary. For Cantonese-speaking members (in many Hong Kong-origin congregations), we also support parallel 廣東話 streams from the same pulpit.

Built for sending churches with mainland China missions

Mainland China remains a context where overt foreign ministry draws attention. Acts 2 lets a sending pastor preach from a hotel room in Hong Kong, Taipei, or Singapore and have it stream to a mainland house-church gathering, with the sermon arriving in Mandarin on the participants' own phones — no foreign interpreter physically present, no visible foreign worker at the front. The Mandarin stream uses the simplified character set (简体字) for transcript review and contemporary mainland register. For Taiwan and overseas-Chinese partners, we support traditional characters (繁體字) and Taiwan-register vocabulary. Multiple SE Asia and Pacific Rim mission agencies asked us to build exactly this.

Cost compared to human interpretation

Qualified English-Mandarin church interpreters in the US, UK, and Australia run $100 to $250 per hour. Skilled bilingual preaching interpreters who can handle theological vocabulary are scarce. For mainland China mission contexts, finding any trustworthy interpreter is its own challenge. Acts 2 runs at roughly $0.005 per minute. A 60-minute Sunday service translates for $0.30. A full year of weekly Mandarin preaching plus midweek studies costs less than two Sundays with a human interpreter. The economics finally match the scale of the global Mandarin-speaking church and the discretion required by mainland partnerships.

Acts 2:6 — '众人都听见门徒用各人的乡谈说话' — 'each one heard them speaking in his own native language.' For an auntie in Cupertino and a brother gathering in a living room in Shandong, that native language is 普通话 — with the right tones, the right characters, the right warmth. The Spirit who fell at Pentecost speaks fluent Mandarin.

Frequently asked questions

Does Acts 2 use simplified or traditional characters?

Both. Simplified characters (简体字) by default for mainland-origin congregations and missions; traditional characters (繁體字) for Taiwan, Hong Kong, and overseas-Chinese congregations. The transcript and any subtitles match your congregation's preference.

Does the AI get the four tones right?

Yes. Our voice model was trained on native Mandarin speakers across mainland, Taiwanese, and Singaporean accents, and tonal accuracy is preserved in your cloned voice. This is what makes our Mandarin actually listenable rather than confusing.

Can we translate Mandarin and Cantonese at the same time?

Yes. Many Chinese churches in the West have both Mandarin-dominant mainland-origin members and Cantonese-dominant Hong Kong-origin members. Acts 2 streams both from one pulpit in your cloned voice.

Will this work for our mainland China house-church partnership?

Yes. The audio stream is low-bandwidth (around 32 kbps), runs over phones, and works on private encrypted links. Many sending churches use Acts 2 specifically because it does not require a foreign interpreter physically present at the gathering.

Is the Mandarin formal enough for preaching?

Yes. Our model defaults to a sermon-appropriate register closer to the Chinese Union Version than to conversational Mandarin, while keeping warmth the congregation expects.

Can our Mandarin-speaking elders verify the translation?

Yes. We provide a transcript in your chosen character set after every service. Many partner churches in Cupertino, London, and Sydney run weekly reviews with Mandarin-speaking deacons.

Does the AI handle the Chinese Union Version theological vocabulary?

Yes. Words like 耶和华 (Yahweh), 弥赛亚 (Messiah), 圣灵 (Holy Spirit), 救主 (Savior) are handled the way the 和合本 renders them, which is what Mandarin Protestant believers actually expect.

Ready to start?

Start your first Mandarin-translated sermon today at acts2.io. Three minutes to clone your voice, ten minutes to set up the stream, and your next Sunday reaches Mandarin believers — from Silicon Valley to a living room in Henan — in the language they pray in.

Request beta access

Other minority + diaspora languages

🇵🇪

Quechua

Runa Simi

🇲🇽

Yucatec Maya

Maaya T'aan

🇵🇭

Tagalog

Wikang Tagalog

🇭🇹