How to test a translate messaging app before you trust it
Before you rely on a translate messaging app with family or new friends, run these five tests in your own languages, from the builder of Hashti.
A translate messaging app is only as good as it is in your two languages, with your kind of sentences, with the people you actually talk to. The marketing page will say it supports a hundred languages. That tells you nothing about whether it understands your grandmother's Farsi or your cousin's Armenian text speak. So before you trust one with a real relationship, test it. I am going to give you five tests you can run in twenty minutes, and tell you what passing looks like. I built Hashti, which has live translation across 29 languages, so I have run these tests against my own app more times than I can count, and I will tell you where it passed and where it did not.
Why testing matters more than the feature list
Translation quality is not one number. The same engine can be excellent between English and Spanish, decent between English and Farsi, and strange between Armenian and Farsi, because it may be quietly passing through English in the middle. Spoken Persian and written Persian are far apart. Western Armenian and Eastern Armenian are different enough that a model trained mostly on one will stumble on the other. Short chat messages are harder than paragraphs, because a single word with no context has several meanings.
So a feature list that says "Persian, Armenian, 100+ languages" is a claim, not a result. The only result that matters is what happens when you type a real message to a real person. That is what the tests are for.
I wrote earlier about how to pick a messenger that translates and about which messaging apps have translation built in. This post assumes you have a candidate or two and want to know if they are any good.
Test one: the family sentence
Pick a sentence you would actually send to a relative. Not "Hello, how are you." Something with a cultural shape to it. In Farsi, a sentence with taarof in it, the polite back-and-forth that has no clean English equivalent. In Armenian, something with a diminutive in it. In Spanish, a sentence where the formal and informal "you" would change the meaning.
Send it to yourself, or to a patient friend, through the app. Then read the translation out loud. Does it sound like something a person would say, or like a textbook? Does it keep the politeness level, or flatten it?
Passing: the meaning survives and the tone is roughly right. Failing: the translation is grammatically fine but says something colder or ruder than you did. This is the most common failure I see, and it is the one that causes real misunderstandings in families, because the other person does not know it was the machine.
In my own testing, Hashti handles Farsi to English well on everyday sentences and gets taarof wrong about as often as every other engine does. Nobody has solved that. I tell people to keep the politeness in their own words and let the translation carry the facts.
Test two: the ambiguous short message
Type a message of one to three words that could mean several things. "Fine." "Later." "You coming?" In Farsi, something like "باشه" which can be agreement, resignation or a shrug depending on the conversation.
A good translate messaging app uses the previous few messages to pick the right meaning. A poor one translates each message as if it were the first thing anyone ever said.
Passing: short replies land in context. Failing: short replies come out odd or overly literal, and you find yourself writing longer sentences to help the machine. If you notice yourself doing that, the app is making you work for it, and over months that gets tiring.
Test three: the speed test with a live person
This one you cannot do alone. Find someone who speaks the other language, ideally someone you do not know well, so you are not finishing each other's sentences. Have a real five-minute conversation. Ask what they had for breakfast, what they do for work, what their city is like.
Watch two things. How long is the gap between their message and your translation? And how often do you have to ask "wait, what did you mean?"
Passing: the conversation feels like a conversation, with pauses you barely notice, and you ask for clarification maybe once. Failing: every exchange has a visible delay, or you spend half the time repairing meaning. The delay matters more than people think. A two-second gap on every message kills the rhythm that makes a chat feel like talking.
This is the test where the difference between a translate button and live translation shows. A translate button, where you tap each message, is fine for reading an occasional note. For a flowing conversation it is exhausting. Live translation, where every message arrives already in your language, is what makes talking to a stranger feel normal. That is the way I built the translation in Hashti, because the rooms are full of people who do not share a language, and tapping a button on every line was never going to work there.
Test four: the direction test
Translate in both directions, not just into your language. Write your reply in your language and have the other person tell you what they received. Then have them reply and check what you got.
Engines are often better in one direction than the other, usually better into English than out of it, because that is where most of the training data points. If the app is great at turning their Farsi into your English but turns your English into stiff, formal Farsi, you will sound like a government letter to them and never know it.
Passing: both of you say the other sounds like a normal person. Failing: one side sounds natural and the other sounds like a form. Ask directly. People are polite about this and will not volunteer it.
Test five: the mistake test
Make a typo. Use slang. Write the way people actually text, with no punctuation and a word in the wrong language mixed in. "ok see u at 7 inshallah." Mixed-language messages are normal in every immigrant family I know, and a translate messaging app that chokes on them is not ready for real use.
Passing: the app gets the gist and leaves the borrowed word alone or handles it sensibly. Failing: the app translates the mixed-in word into nonsense, or the whole message comes out garbled because of one typo.
What to do with the results
If an app passes all five tests in your language pair, trust it for friendly conversation, family news, making plans and getting to know people. That is what translation is good enough for in 2026.
Do not trust any translate messaging app, including mine, for medical details, legal matters, money, or jokes that depend on wordplay. For those, get a human or at least slow down and confirm every important fact in a second message. I say this on every post I write about translation because it is the one piece of advice that prevents real harm.
If an app fails test one or test three, I would not use it for a relationship that matters. A cold translation sent to a parent, or a conversation that stalls on every line, does damage that no feature list makes up for.
Where Hashti fits, and where it does not
Hashti is a room app first. You walk into a public room with a name and a topic, you meet people, and if you want to keep talking you move to a private chat, a call or the walkie-talkie. Live translation across 29 languages sits on top of that, and it is the one part of the app that costs money. It is part of Hashti Plus, at $4.99 a month or $39.99 a year. Everything else is free.
Where it fits: you want to find people who speak a language you are learning, or people from your own background who happen to speak a different language than you do. Armenians from Iran, Armenia, Lebanon and Los Angeles do not all share a first language, and I built this partly for that exact mess. Being Armenian-Iranian in LA means my own family group chat runs in three languages on a good day.
Where it does not fit: you already have the people and you just want a translate button inside the app you use today. If your family is on WhatsApp, a separate translator is less disruptive than moving everyone. And if your language is not among the 29, Hashti is simply not the answer yet. The app's own interface is in English today, with a Farsi one being built, so a relative who reads only Farsi will find the menus hard right now. I would rather tell you that than have you find out after you have asked them to sign up.
It is also for adults only. Every account is checked once against a government document, the photo is deleted, and a fingerprint of the document stays so the same document cannot open a second account. Unverified accounts cannot host rooms, speak in voice rooms or message strangers. Twelve verified reports closes an account for good. The safety page explains it. Some people find that too much for a chat app. In a room full of strangers who cannot even read each other's language, I think it is the minimum.
A few habits that make translated chats work
Write in complete, plain sentences when it matters. Save the slang for people who share your language. Put one idea in each message so the engine has less to untangle. When something sounds off, say so right away instead of guessing. And when you are the one being translated, remember the other person hears the machine's voice, not yours, so add the warmth back in with an extra line.
Run the five tests. Twenty minutes with a patient friend will tell you more than any review, including this one.
Hashti is free, and it is 18+. Hashti Plus — live translation, writing help and catch-ups — is $4.99 a month or $39.99 a year, and nothing else costs anything. How rooms work is on the rooms page, and how reports and the ID check work is on the safety page.