Best LINE Translation Bots Compared (2026)

LINE's built-in translate only works on Android. It requires tapping each message individually. It does not run in group chats. If you need continuous translation in an active LINE chat, you need a translation bot.

A translation bot is a LINE account you add to a chat. It translates every message from every speaker automatically. The bot runs on a server, so it works on iPhone, Android, and desktop.

This page compares LINE's built-in feature, manual workarounds, and dedicated translation bots. Where an option falls short, we say so. Where one fits a specific use case better, we say that too.

What to look for in a LINE translation tool

Before comparing specific options, here is what matters when choosing how to translate LINE messages.

Platform support. Does it work on iPhone, Android, or both? LINE's built-in translate is Android only. A server-side bot works on every device because the translation happens remotely, not on your phone.

Automatic vs. manual. Does translation happen on its own, or do you need to tap, copy, or switch apps for each message? In a slow conversation, manual is fine. In an active chat with ten unread messages, manual means you are always behind.

Group chat support. Can it handle multiple speakers sending messages at the same time? A group chat with five people talking in Thai produces messages faster than any manual method can process. Tools that work message-by-message break down here.

Bidirectional translation. Does it translate in both directions? If you speak English and the chat speaks Thai, you need incoming Thai translated to English and your English translated to Thai. One-directional tools solve half the problem.

Languages supported. Does it cover the language pair you need? For LINE, the most common pairs are Thai to English, Japanese to English, and Chinese (Traditional) to English. These reflect the countries where LINE is dominant.

Pricing. How much does it cost, and what do you get? Free tools exist but come with trade-offs. Paid tools should offer enough to justify the cost for daily use.

Privacy. What happens to your messages? Any translation tool processes your conversations. The question is whether messages are stored, used for training, or shared.

LINE's built-in translate

LINE's own translation feature is the obvious starting point, and for certain use cases, it works well enough.

How it works. On Android, you long-press a message, tap "Translate," and the translated text appears below the original. One message at a time.

What it does well. For checking the occasional message in a one-on-one chat on Android, it is fast and free. No setup, no extra apps, no subscription. You long-press, you tap, you read.

Where it falls short. As of early 2026, it only works on Android. iPhone users cannot access it at all. It requires a manual tap for every single message. It translates in one direction only, so others in the chat cannot read your messages in their language. And there is no automatic mode for group chats.

For a fuller breakdown of these limitations, see Does LINE Have a Translator?.

Best for: Checking a single message occasionally on Android. Not practical for following conversations.

Google Translate (manual copy-paste)

Google Translate is not a LINE translation bot. It is a separate app. But it is the workaround most people try first, so it belongs in any honest comparison.

How it works. Copy a message from LINE, switch to Google Translate, paste, read the translation, switch back. To reply in another language, reverse the process: type in Google Translate, copy, switch back to LINE, paste.

What it does well. It is free. It supports a wide range of languages. Translation accuracy for common language pairs (Thai to English, Japanese to English, Chinese to English) is decent for straightforward messages. For a single message you need to understand right now, it works.

Where it falls short. The workflow is slow. Seven steps per message. In an active group chat, you spend more time switching apps than reading the conversation.

It also struggles with conversational language. LINE chats are informal. Thai speakers use "555" for laughter and drop vowels. Japanese speakers mix casual forms with emoji. Taiwanese Mandarin includes slang that trips up tools expecting standard Chinese. Google Translate performs best on formal text. Chat messages are not that.

There is no group chat integration. Each message from each person needs its own copy-paste cycle.

Best for: Translating a single message on any device when you have no other option. Not practical for live conversations.

Flewnt

Flewnt is a translation bot built specifically for LINE. You add it to a chat the same way you would add another person, and it translates every message automatically.

How it works. Add Flewnt as a friend on LINE, tell it which language you speak, and invite it to any chat. Every message is translated from that point. When someone sends Thai, Flewnt posts the English translation. When you send English, Flewnt posts the Thai translation for everyone else. One bot message per user message, in the format Name💬Translation, so you can see who said what at a glance.

Platform support. iPhone and Android. The bot runs on a server, not on your phone, so your device does not matter. This is the key difference from LINE's built-in translate, which is restricted to Android.

Group chat support. Yes. Flewnt works in chats with two people or twenty. It translates every message from every speaker, each attributed to the right person.

Bidirectional. Yes. Both sides of the conversation are translated. English speakers read Thai messages in English. Thai speakers read English messages in Thai. No one needs to use a separate app.

Languages. Thai, Japanese, Chinese (Traditional), and other language pairs. The most common use is English paired with one of the three languages dominant in LINE's core markets.

Pricing. $9/mo on the monthly plan, or $4.50/mo billed annually at $54/year. 50 free translations to start, no card required. Enough to try it in a real conversation before paying anything. Full details on the pricing page.

Privacy. Messages are processed for translation and not used for model training. Flewnt does not sell or share message data.

Here is what a multilingual chat looks like with Flewnt translating. Thai, Japanese, and Chinese speakers in one conversation, each message translated to English automatically:

Where it falls short. Flewnt is a paid product after the free trial. If you only check a single message once a week, a subscription does not make sense. LINE's built-in translate (Android) or Google Translate (any device) will handle that for free.

The bot also adds messages to the chat. Every translated message appears as a separate bot message, which means the chat has roughly twice as many messages as it would otherwise. In an active chat, this adds visual noise. Everyone in the chat sees the translations, not just you. For some chats, that is the point. For others, it may feel cluttered.

Best for: Following conversations daily in chats you are part of regularly, especially group chats with multiple speakers and languages.

See how it works or try it free.

Other LINE translation bots

The LINE translation bot market is small. LINE is dominant in Thailand, Japan, and Taiwan, but the number of dedicated translation bots built for it is limited.

LINE Translate Bot (official). LINE previously offered an official translate bot account. It supported a limited set of languages and translated one direction per chat (you chose a language pair when you added it). It still appears in some LINE bot directories, but its availability and language coverage are inconsistent by region.

Third-party bots. A few independent developers have built LINE translation bots over the years. Most are regional, supporting only Japanese-English or Thai-English. Some have been discontinued. If you find one, check when it was last updated and whether it supports group chats with multiple languages.

If a new option with genuine group chat translation for LINE appears, we will update this section.

Comparison table

	LINE built-in	Google Translate	Flewnt
Type	Built-in feature	Separate app (manual)	LINE bot (automatic)
iPhone	No	Yes (copy-paste)	Yes
Android	Yes	Yes (copy-paste)	Yes
Automatic	No (tap each message)	No (copy-paste each)	Yes (every message)
Group chats	Impractical (tap each)	Impractical (copy each)	Yes
Bidirectional	No (incoming only)	Yes (manual both ways)	Yes (automatic both ways)
Languages	Multiple	130+	Thai, Japanese, Chinese, others
Price	Free	Free	$9/mo or $4.50/mo annual
Setup	None	Install app	Add bot to chat
Best for	Quick Android spot-check	One-off translations	Daily chat translation

Which LINE translation bot to use when

The right tool depends on your situation. Here is the short version.

You want to check a single message on Android. Use LINE's built-in translate. It is free, it is already there, and for one message at a time it works fine. Long-press, tap, read.

You want to check a single message on iPhone. Use Google Translate. Copy the message, paste it, read the translation. As of early 2026, LINE's built-in translate is not available on iOS, so this is your free option. More on translating LINE messages on iPhone.

You want to follow a conversation, especially with multiple speakers. Use a translation bot. Once a chat moves beyond the occasional message, manual methods stop keeping up. Ten unread messages in Thai means ten copy-paste cycles or ten individual taps. In a group chat with five people, the volume is even higher. A bot translates every message from every speaker without any action on your part.

You are on a budget and rarely need translation. Use LINE's built-in translate on Android or Google Translate on iPhone. If you encounter a foreign-language message once a week, a paid subscription is not justified.

Getting started

If your situation is the occasional message, you already have what you need. LINE's translate (Android) or Google Translate (any device) will cover it.

If your situation is daily conversations in chats you cannot fully read, try a translation bot.

Flewnt gives you 50 free translations to start, no card required. Add it to one of your LINE chats and see how it works in a real conversation. If it solves the problem, the paid plan is $9/mo or $4.50/mo on the annual plan.

Start free with 50 translations

Frequently asked questions

What is a LINE translation bot?

A LINE translation bot is a LINE account you add to a chat. Once it is there, it reads every message and posts a translation automatically. The bot runs on a server, so it works on iPhone, Android, and desktop.

Does LINE have a built-in translator?

Yes, but with significant limitations. LINE's built-in translate is Android only, requires tapping each message individually, translates in one direction, and has no automatic mode. Full breakdown here.

Can I translate LINE messages on iPhone?

Not with LINE's built-in feature. As of early 2026, iPhone users need either a translation bot in the chat or a manual copy-paste workflow with a separate app like Google Translate. See all iPhone options.

Are LINE translation bots safe to use?

Any translation bot processes your message text to translate it. The safety depends on the bot's privacy practices. Look for bots that do not store messages long-term and do not use chat data for training. Flewnt processes messages for translation only and does not use them for model training or share them with third parties.

How much do LINE translation bots cost?

Pricing varies by service. Flewnt costs $9/mo on a monthly plan or $4.50/mo billed annually. It includes 50 free translations to start. LINE's built-in translate and Google Translate are both free but require manual effort for each message.

Do translation bots work in LINE group chats?

Yes. This is where translation bots are most useful. A bot translates every message from every speaker automatically. In a group chat with multiple people speaking different languages, the bot handles all of them without any manual action. Each translation is attributed to the person who sent the original message.