Tomohiro Goto This workflow corresponds to n8n.io template #9943 — we link there as the canonical source.
This workflow follows the HTTP Request → OpenAI recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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{
"id": "jcqcULGGIS3CRxFD",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Slack Auto Translator (/trans) \u2014 JA \u21c4 EN",
"tags": [],
"nodes": [
{
"id": "27a5c8da-5f3a-42c4-a5b3-661ba6273ae2",
"name": "Webhook (Slash Command)",
"type": "n8n-nodes-base.webhook",
"position": [
-48,
-224
],
"parameters": {
"path": "slack/trans",
"options": {},
"httpMethod": "POST",
"responseMode": "responseNode"
},
"typeVersion": 2
},
{
"id": "b1f97605-e600-4cb0-bfda-fa2d46f97b04",
"name": "Respond to Webhook",
"type": "n8n-nodes-base.respondToWebhook",
"position": [
400,
-224
],
"parameters": {
"options": {
"responseCode": 200,
"responseHeaders": {
"entries": [
{
"name": "Content-Type",
"value": "text/plain; charset=utf-8"
}
]
}
},
"respondWith": "text",
"responseBody": "={{$json[\"ack\"]}}"
},
"typeVersion": 1
},
{
"id": "6a1b64d8-e2f2-480c-8587-85ae58be1fc6",
"name": "Detect Language (Code)",
"type": "n8n-nodes-base.code",
"position": [
160,
16
],
"parameters": {
"jsCode": "// --- Parse Slack payload & trim ---\n// --- Slack\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u53d6\u5f97\u3057\u3066\u6574\u5f62 ---\nconst body = $json.body || $json;\nconst raw = (body.text || '').trim();\n\n// --- Early return if empty ---\n// --- \u7a7a\u5165\u529b\u306f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8fd4\u3057\u3066\u6253\u3061\u5207\u308a ---\nif (!raw) {\n return [{ json: {\n text: '',\n target: '',\n response_url: body.response_url,\n user_id: body.user_id,\n channel_id: body.channel_id,\n error: 'Please provide text after /trans.' // \u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\n }}];\n}\n\n// --- Optional override: \"en: \u3053\u3093\u306b\u3061\u306f\" / \"ja: hello\" ---\n// --- \u660e\u793a\u30bf\u30fc\u30b2\u30c3\u30c8\u6307\u5b9a\u306b\u5bfe\u5fdc\uff08\u4f8b: en:, ja:\uff09---\nconst m = raw.match(/^(\\w{2}):\\s*(.*)$/);\nlet text = raw;\nlet override = null;\nif (m && (m[1] === 'en' || m[1] === 'ja')) {\n override = m[1];\n text = m[2];\n}\n\n// --- Heuristic JA detection ---\n// --- \u65e5\u672c\u8a9e\u30b9\u30af\u30ea\u30d7\u30c8\u5224\u5b9a ---\nconst hasJa = /[\\p{Script=Hiragana}\\p{Script=Katakana}\\p{Script=Han}]/u.test(text);\n\n// --- Decide target language (override wins) ---\n// --- \u30bf\u30fc\u30b2\u30c3\u30c8\u8a00\u8a9e\u6c7a\u5b9a\uff08\u660e\u793a\u6307\u5b9a\u3092\u512a\u5148\uff09---\nconst target = override ?? (hasJa ? 'en' : 'ja');\n\nreturn [{\n json: {\n text,\n target,\n response_url: body.response_url,\n user_id: body.user_id,\n channel_id: body.channel_id\n }\n}];"
},
"typeVersion": 2
},
{
"id": "48be3dda-347d-45b0-a663-2b9c5945e433",
"name": "OpenAI (Chat) - Translate",
"type": "@n8n/n8n-nodes-langchain.openAi",
"position": [
512,
16
],
"parameters": {
"modelId": {
"__rl": true,
"mode": "id",
"value": "gpt-4o-mini"
},
"options": {
"temperature": 0.2
},
"messages": {
"values": [
{
"role": "system",
"content": "=You are a precise translator. Translate the input ONLY into the target language.\n- Preserve punctuation and line breaks.\n- Do NOT add explanations.\n- Keep style natural and concise.\n\nTarget language: {{$json[\"target\"]}}\n\nInput:\n{{$json[\"text\"]}}"
},
{
"content": "={{$json[\"text\"]}}"
}
]
}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.8
},
{
"id": "2f4bb84e-3109-4f91-ae22-124b83e73d0c",
"name": "Prepare Response",
"type": "n8n-nodes-base.code",
"position": [
688,
240
],
"parameters": {
"jsCode": "const j = $json;\n\n// --- Retrieve translated text (fallback-safe) ---\n// --- \u7ffb\u8a33\u7d50\u679c\u3092\u5b89\u5168\u306b\u53d6\u5f97 ---\nconst translated =\n j.message?.content ??\n j.choices?.[0]?.message?.content ??\n j.data?.[0]?.content?.[0]?.text?.value ??\n j.response ??\n 'No content';\n\n// --- Read original & user id from Detect node ---\n// --- Detect\u30ce\u30fc\u30c9\u304b\u3089\u539f\u6587\u3068\u30e6\u30fc\u30b6\u30fcID\u3092\u53d6\u5f97 ---\nconst detect = $node[\"Detect Language (Code)\"].json;\nconst original = detect.text;\nconst userId = detect.user_id;\n\n// --- Public message format ---\n// --- \u516c\u958b\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6574\u5f62 ---\nconst reply = `<@${userId}>\\n> ${original}\\n${translated}`;\n// const reply = `<@${userId}> ${translated}`; // \u2190 \u7ffb\u8a33\u3060\u3051\u6d3e\u306b\u3057\u305f\u3044\u6642\u306f\u3053\u306e\u884c\u306b\u5207\u66ff\n\nreturn [{ json: { reply, response_url: j.response_url } }];"
},
"typeVersion": 2
},
{
"id": "cdeb82fe-2702-4fbf-a2c4-3f6263c289aa",
"name": "Code (Ack)",
"type": "n8n-nodes-base.code",
"position": [
160,
-224
],
"parameters": {
"jsCode": "return [{ json: { ack: \"Translating...\" } }];"
},
"typeVersion": 2
},
{
"id": "24c37c6e-7d41-4828-b284-aafe250b16d8",
"name": "HTTP Request",
"type": "n8n-nodes-base.httpRequest",
"position": [
864,
240
],
"parameters": {
"url": "={{$json[\"response_url\"]}}",
"method": "POST",
"options": {},
"sendBody": true,
"bodyParameters": {
"parameters": [
{
"name": "response_type",
"value": "in_channel"
},
{
"name": "text",
"value": "={{$json[\"reply\"]}}"
}
]
}
},
"typeVersion": 4.2
},
{
"id": "ca69bd68-8977-4a28-8a72-c889af35b1d2",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
864,
144
],
"parameters": {
"color": 2,
"height": 96,
"content": "Posts the final translation back to Slack (in_channel by default).\nSwitch to ephemeral if you prefer private replies."
},
"typeVersion": 1
},
{
"id": "68b6b3b8-7883-4e9b-93f8-83bfc8a7e85b",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
160,
-80
],
"parameters": {
"color": 4,
"height": 96,
"content": "Detects JA/EN automatically. Supports overrides like \nen: \u3053\u3093\u306b\u3061\u306f \nand handles empty input."
},
"typeVersion": 1
},
{
"id": "9d050866-b804-44ae-a81a-91b925ebc9fd",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
512,
-64
],
"parameters": {
"color": 6,
"width": 288,
"height": 80,
"content": "Uses gpt-4o-mini with temperature 0.2 for stable translations."
},
"typeVersion": 1
},
{
"id": "ec9fb181-2acd-4d17-a367-b61b75c7e180",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
160,
-304
],
"parameters": {
"color": 5,
"width": 208,
"height": 80,
"content": "Sends an immediate \u201cTranslating...\u201d response to avoid Slack\u2019s 3s timeout."
},
"typeVersion": 1
},
{
"id": "5a2c7e05-221c-433e-bdd8-8e9fcb9504ad",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
-96,
-304
],
"parameters": {
"width": 192,
"height": 80,
"content": "Receives /trans requests from Slack. Uses Production URL in Slack."
},
"typeVersion": 1
},
{
"id": "553ffc33-92aa-4274-aa93-555e25ba42da",
"name": "Merge (Combine Response)",
"type": "n8n-nodes-base.merge",
"position": [
512,
240
],
"parameters": {
"mode": "combine",
"options": {},
"combineBy": "combineByPosition"
},
"typeVersion": 3.2
}
],
"active": true,
"settings": {
"executionOrder": "v1"
},
"versionId": "203ba874-0839-4b4b-bbab-61b1409ad662",
"connections": {
"Code (Ack)": {
"main": [
[
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
},
"Prepare Response": {
"main": [
[
{
"node": "HTTP Request",
"type": "main",
"index": 0
}
]
]
},
"Respond to Webhook": {
"main": [
[]
]
},
"Detect Language (Code)": {
"main": [
[
{
"node": "OpenAI (Chat) - Translate",
"type": "main",
"index": 0
},
{
"node": "Merge (Combine Response)",
"type": "main",
"index": 1
}
]
]
},
"Webhook (Slash Command)": {
"main": [
[
{
"node": "Detect Language (Code)",
"type": "main",
"index": 0
},
{
"node": "Code (Ack)",
"type": "main",
"index": 0
}
]
]
},
"Merge (Combine Response)": {
"main": [
[
{
"node": "Prepare Response",
"type": "main",
"index": 0
}
]
]
},
"OpenAI (Chat) - Translate": {
"main": [
[
{
"node": "Merge (Combine Response)",
"type": "main",
"index": 0
}
]
]
}
}
}
Credentials you'll need
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openAiApi
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About this workflow
This workflow enables automatic translation in Slack using n8n and OpenAI. When a user types followed by text, n8n detects the language and replies with the translated version via Slack. Detects the input language automatically Translates between Japanese ↔ English using…
Source: https://n8n.io/workflows/9943/ — original creator credit. Request a take-down →
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