By Sagar Shankaran, Founder of CallSphere
Non-English menu boards and window graphics get reprinted over one mangled character. Live translation on the proof call catches it before the panels print.
Key takeaways
That objection is fair, and it was true. The 2024 version meant holding up a phone, waiting, reading a robotic sentence off a screen, and hoping. It was fine for "where is the bathroom" and hopeless for the conversation that actually matters in a print shop: walking a customer line by line through a proof they are about to sign off on, in a language nobody in your prepress department reads.
Here is the situation every shop in a diverse market knows. A restaurant owner brings in copy for a four-panel menu board, typed in Word, in Vietnamese. Or a quinceanera invitation set in Spanish. Or window graphics for a nail salon in Korean, or a church banner in Haitian Creole, or a bilingual wayfinding package for a clinic. Your prepress tech places the text, the font substitutes, the tone marks or accents get mangled or dropped, and the proof goes out looking perfectly fine to everyone in the building who cannot read it.
The customer approves it, because the customer is also not a typesetter and is looking at a small PDF on a phone. Then it prints on six 3mm aluminum composite panels, gets installed, and a week later somebody's aunt points out that panel three says something unfortunate.
A six-panel menu board rebuild is materials, flatbed time, laminate, and a second install trip with two people and a lift. But the bigger loss is the one that never shows up in job costing: the customers you serve badly enough that they stop bringing you work, and tell everyone in their business association about it.
Small non-English-speaking business owners are a large and loyal share of the walk-in market for signage and short-run print in most American cities — restaurants, salons, tiendas, auto shops, churches, insurance offices. They order signs, banners, menus, decals, business cards, and they reorder. And they are exactly the segment most likely to have a bad experience at a shop counter, because the whole transaction rides on precision in a language the shop cannot verify.
What changed in 2026 is worth stating simply: live translation stopped being something you schedule and became something that happens inside the conversation itself. Gemini 3.5 Live Translate detects more than 70 languages and translates speech to speech in near real time; Gemini 3.1 Flash Live handles audio to audio across 90-plus. Nobody is booking an interpreter for a menu-board proof. It happens while the call is happening.
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Tuesday, 10:20am. The proof for the menu board is ready. Instead of e-mailing the PDF and hoping, your CSR calls the owner and the conversation runs in both languages at once — she speaks English, he hears Vietnamese, he answers in Vietnamese, she hears English, with roughly the pacing of a normal phone call.
She reads panel three aloud, item by item, and asks him to confirm each line. He catches that the diacritic on one dish is wrong — the meaning shifted — and says so. That is a two-minute correction in Illustrator. Not a reprint. She then reads back the finished sizes, the substrate, the mounting method and the install date, in his language, and sends the approval link. The signed proof goes on the job jacket as always, and the call recording and its written summary go with it.
flowchart TD
A["Customer copy arrives in Vietnamese"] --> C["Prepress sets the proof"]
B["Shop template and finished sizes"] --> C
C --> D["CSR calls owner, live translation both ways"]
D --> E{"Owner confirms every line?"}
E -->|No, tone mark wrong on panel 3| C
E -->|Yes| F["Signed proof and call summary on the job jacket"]
F --> G["Panels print, laminate, install"]
Notice which problem this solves and which it does not. It solves comprehension — the customer genuinely knows what he approved, and you have evidence of that. It does not solve font coverage. If your typeface has no glyph for a character, live translation will not save you; that is a prepress discipline problem, and the fix is the same as it always was: get the text as a placed file, check the glyphs, and never retype foreign-language copy by hand.
Turn the same capability toward the shop floor and the truck. Plenty of sign companies run install crews and production help where the working language is Spanish and the paperwork is in English. The morning briefing before an aerial-lift job — the job hazard analysis, the drop-zone plan, who is spotting, what the wind cutoff is, where the disconnect is — is a safety conversation that has to actually land, not be nodded at.
The same goes for the general contractor's site orientation on a new build, and for the equipment training the lift rental company delivers in English on a Tuesday morning. A crew lead running a live-translated briefing means the newest applicator on the truck hears the sequence in his own language, and can ask a question back and get an answer. If you have ever had a $6,000 face cracked because someone did not understand the lifting instruction, you already know what this is worth.
This one is best measured as a defect rate, because that is where the money is. Illustrative figures for a shop in a mid-size city with a meaningful non-English customer base:
| Assumption | Value |
|---|---|
| Jobs per month containing non-English typeset copy | 9 |
| Share today that reach production with a text error | 1 in 6 = 1.5 jobs |
| Average cost of the rebuild (material, machine time, second install trip) | $540 |
| Monthly rework cost today | $810 |
| Errors caught at the proof call once the customer truly understands it | 75% |
| Rework avoided | $608 per month |
| Walk-in quotes lost per month to a conversation that stalled on language | 3 |
| Half of those recovered, average order $340 | $510 per month |
| Combined | $1,118 per month, plus the accounts you keep |
Prove it by tagging jobs. Add a checkbox to your job record for "non-English copy" and a reason code on every reprint. Ninety days of that will tell you your real defect rate, which is the only number in the table you should trust more than your own experience.
Live translation on a call is comprehension, not proofreading. Typeset copy in a language nobody at the shop reads still needs a native reader to sign off — and the cheapest, most reliable native reader is the customer, on the phone, reading their own proof aloud line by line. That is the process. Do not let the machine's confidence substitute for that step.
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Regulated and accessible signage is its own category. ADA-compliant tactile signage with Grade 2 Braille is not a translation problem and must not be treated as one: the character heights, the finish, the 48-to-60-inch mounting range and the Braille itself follow the ADA Standards, and Braille goes to a vendor or proofreader who verifies it physically. A translation model checking Braille dots is not a check.
Legal notices, permit documents, contract terms and anything a court might read should go to a certified human translator. And be honest with customers about what is happening on the call — say at the start that translation is machine-assisted. Most people are fine with it. Nobody is fine with finding out afterward.
Start narrow, then. Pick your two most common non-English languages — from your own customer list, not from census data — and use it for one thing only: the proof-approval call. Not sales, not estimating, not collections. The proof call is short, the vocabulary is narrow, and the payoff shows up in your reprint log within a month. If the CSR who makes those calls says it is easier than what she was doing before, extend it to the front counter for walk-ins and then to the crew briefing.
Spanish is excellent. Vietnamese, Korean, Mandarin, Portuguese, Arabic and Haitian Creole all work at conversational quality for shop-floor and proof-approval talk. Where it gets rougher is heavy regional dialect, trade slang, and any language with a small online presence. Test with a bilingual employee or a friendly customer before you put it in front of a stranger.
Both, and the counter is often the bigger win. A walk-in who cannot describe what they want will leave. The counter version needs a decent microphone and a moment of setup, and it changes a stalled five-minute conversation into a written order.
It can tell you what the text says, which is genuinely useful when you are checking that what you placed matches what they sent. It cannot tell you whether the customer meant to write that. Keep the customer's own eyes on the final proof.
Yes, and it costs you nothing. Disclosure at the top of the call is also the sensible posture under the state AI transparency laws that took effect on 1 January 2026 in Texas and California, and it is simply how you would want to be treated.
The first language barrier a shop hits is usually the phone, not the proof. CallSphere builds AI voice and chat agents that answer the shop line and website chat in the caller's language, take the job details, and book the estimator or the site survey — so a restaurant owner calling about a menu board gets a real conversation on the first ring instead of a voicemail box he will not leave a message in. The proofreading still belongs to a human who reads the language. Getting the customer through the front door does not.
Written by
Sagar Shankaran· Founder, CallSphere
LinkedInSagar Shankaran is the founder of CallSphere, where he builds production AI voice and chat agents deployed across healthcare, hospitality, real estate, and home services. He writes about agentic AI, LLM engineering, and shipping voice agents that handle real calls in production.
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