> ## Documentation Index > Fetch the complete documentation index at: https://www.bolna.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Single Prompt view for multilingual agents > Write one prompt for every language your Bolna agent speaks: mark the lines that need translating and review each language's wording in the Translations panel. Build a multilingual agent from one prompt instead of maintaining a separate prompt for every language. You write the role, rules and call flow once, then mark only the lines the agent speaks out loud. Bolna gives each marked line its own wording per language; everything else is shared. **Beta.** The Single Prompt view is being A/B tested, so it may not be on your account yet. To turn it on, email [support@bolna.ai](mailto:support@bolna.ai). *** ## Why one prompt A multilingual agent is really one conversation spoken in several languages. The Single Prompt view treats it that way. * **Change it once, everywhere.** Rules, call flow and instructions live in one shared prompt. Edit them once and the change applies to every language, with no tabs to hop between and no edits to repeat. * **Your languages never drift apart.** With a single source, there's no risk of updating Hindi and forgetting Tamil. Every language runs the same logic. * **No translating by hand.** Mark the lines your agent speaks and Bolna translates them into each of your languages. You only step in to review or fine-tune the wording. In the [older canvas](/docs/agent-setup/agent-tab#canvas), each language has its own full prompt, even though most of that text is identical. Every change has to be repeated in each tab, and over time the tabs fall out of sync. Here's how the two compare: | | Older canvas | Single Prompt view | | - | - | - | | **Prompts** | One full prompt per language | One prompt for all languages | | **What differs by language** | Everything in that tab | Only the lines you mark | | **Changing a rule** | Edit every language tab | Edit once | | **Adding a language to a saved agent** | A blank tab to write by hand | Marked lines are translated automatically | *** ## Which agents use the Single Prompt view An agent's view is set when it's created and saved with it. Enabling the view on your account doesn't change agents you already have; they keep working exactly as before, in the editor and on calls. The table assumes the Single Prompt view is enabled for your account. | Agent | Opens in | | - | - | | **New agent** created in Agent Studio | Single Prompt view | | **Imported agent** with one language | Single Prompt view | | **Imported agent** already using the Single Prompt view | Single Prompt view, whatever its number of languages | | **Imported agent** with more than one language | Older canvas | | **Existing agent** created before you had the view | Older canvas | Imported multi-language agents stay on the older canvas because their separate per-language prompts don't map onto one shared prompt. See [Import agents](/docs/agent-setup/copy-import-agent). **How to tell which view you're in:** the Single Prompt view shows language chips with a **+** icon. The older canvas shows language tabs with a **+ Add Language** button. *** ## How translation works Mark any line for translation explainer at the top of the Canvas, comparing a marked Hindi line that is translated on English calls with an unmarked Hindi line that stays in Hindi Every line in the prompt is either **marked** or **unmarked**. * **Marked lines** have their own wording in each language. On a call, the agent uses the wording for the caller's language. Mark what the agent says out loud: the opening line, questions, confirmations and closing lines. * **Unmarked lines** stay exactly as written, in every language. Instructions, rules and section headings usually stay unmarked. You write the prompt in your **default language**, shown with a crown. Every other language takes its wording from it. If an agent has more than one language and no lines are marked, the Canvas shows a warning. Without marked lines, the agent speaks every line in the default language on all calls. ### Mark a line for translation A translate icon appears in the left margin, with the tooltip **Mark as translation to auto-translate across all current and future languages**. Hovering a line under Section 3: Application Confirmation shows a translate icon in the left margin with the tooltip Mark as translation to auto-translate across all current and future languages The line turns blue and the **Translations** panel opens for it. ### Mark a phrase within a line To translate only part of a line, such as the question after a label or the example replies inside an instruction, mark just those words. Highlight the phrase in the prompt. A **Mark for translation** button appears. The Hindi question after Question 1: selected in the prompt, with a Mark for translation button above it The phrase turns blue. The rest of the line stays shared text. ### Change or unmark a marked line To change a marked line later, click it and choose: * **View translations** to open the Translations panel. * **Unmark** to turn it back into shared text. You can also click the translate icon again. A marked Hindi question under Section 3: Application Confirmation with a menu showing View translations and Unmark ### Edit a line's wording The **Translations** panel opens on the right of the Canvas. It shows one box per language for the selected line. The language you're viewing is labelled **Viewing**, and your default language is labelled **Default**. Canvas with marked Hindi lines in blue and the Translations panel on the right showing Hindi labelled Viewing and Default, English and Tamil boxes for the selected line Type or correct the wording in any language's box. **Save** stays disabled until you change something. To drop your changes, click **Discard** (or **Cancel** on a line you've just marked). The panel only saves wording into the Canvas; the agent isn't saved until you do this. If the agent has only one language, the panel tells you to add another before you can translate the line. *** ## Manage languages Languages appear as chips at the top of the Canvas. The default language has a crown, and the eye icon shows the one you're viewing. Click a chip to see the prompt in that language. Voice and transcription for each language are still set in the [Languages Tab](/docs/agent-setup/audio-tab). Language picker under the Canvas language chips with a Search languages box, Hindi under Selected languages marked Default, and English, Tamil, Telugu, Kannada and Malayalam under Available languages ### Add a language Click the **+** icon and pick a language from **Available languages**. What happens next depends on the agent: | Agent state | What happens | | - | - | | **Saved, with marked lines** | Bolna translates every marked line. A notification reads **Adding \** and changes to **\ added** when done, usually within a minute. If no wording comes back, the language is still added and you'll see **Translations are not ready**; fill in the wording from the Translations panel. | | **No lines marked** | A dialog asks you to choose **Mark lines first** or **Add language anyway**. | Marked lines that still have no wording in a language are highlighted, that language's chip shows an amber dot, and a banner tells you how many lines need wording. Canvas language chips Hindi with a crown, English and Tamil with amber dots, a + icon, and a banner reading 1 line has no English wording yet, highlighted below. Click a highlighted line to fill it in. ### Change the default language Open the language picker, hover over a language under **Selected languages** and click **Make default**. ### Remove a language In the same picker, hover over the language and click the remove icon. Removing a language deletes its wording for every marked line, along with its voice, speech recognition, handoff and related settings. You can't remove the default language; make another language the default first. *** ## Work with sections The prompt is split into collapsible sections. A new agent built from scratch starts with **Identity and Demeanour**, **Conversation Starter**, **Conversation Flow**, **Closing**, and **Frequently Asked Questions**. Each has placeholder text to replace with your own. Canvas with the Hindi language chip, AI Edit and Browse Modules buttons, a Mark any line for translation banner, and collapsible Identity and Demeanour, Conversation Starter, Conversation Flow and Closing sections with placeholder text * **Collapse or expand** a section with the chevron next to its heading. * **Add a section** with **+ Add Section** at the bottom of the Canvas, or type `#` in the prompt. * **Delete a section** with the delete icon on its heading. This removes the heading and everything under it. * **Go full screen** with the expand icon at the top right of the Canvas. Variables (`{{`), modules (`@`), **Browse Modules** and the token count work as described in the [Agent Tab](/docs/agent-setup/agent-tab). *** ## Use AI Edit [AI Edit](/docs/agent-setup/agent-tab#ai-edit) works on the shared prompt, so its changes apply to every language. When it edits a marked line, the suggestion can include that line's wording in your other languages. While AI Edit is open, you can switch the language you're viewing, but you can't add or remove languages or change the default. *** ## Next steps Welcome message, prompts, variables and hangup settings. Supported languages and how multilingual agents work. When the agent changes language during a call. Copy an agent into your account by agent ID. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.