You’re reading documentation in a second language and one sentence won’t resolve.
What happens next is always the same. Select the sentence. ⌘C. Hunt for the browser tab. Open the translation service. Click the input box. ⌘V. Read. Go back. Find your place again.
Seven or eight actions, maybe fifteen seconds. Once is nothing. But read one long technical document and you’ll do it ten or twenty times.
And the cost isn’t the seconds. It’s that you lose your place every single time. Technical writing, contracts, papers — meaning lives in the connections between sentences. Leave for another tab once per sentence and those connections break on every trip.
MacSide AI removes the trip. Select, press ⌘C twice, done.
The whole interaction
In the video, Bluetooth is selected mid-page in Apple’s developer documentation and ⌘C is pressed twice. A panel opens above the page, a question is composed automatically —
What is “Bluetooth”? Please explain briefly.
— and the answer comes back. The page underneath hasn’t moved. No tab was switched.
There’s a “Ask a follow-up” control in the panel’s top right, so you can push one level deeper on whatever came back.
You never left the page. That’s the actual feature.
It isn’t only a translate button
Watch closely and you’ll notice the answer isn’t a translation — it’s a definition. That’s a configuration choice. What ⌘C+C does is up to you.
Which makes this less a translate button and more a shortcut that runs a job you’ve decided on, against whatever text you selected.
Some settings worth having:
- Translate — turn the selection into your language (the common one)
- Explain — define an unfamiliar term, using the surrounding context
- Summarize — compress a dense paragraph into three lines
- Simplify — turn legalese or policy text into plain language
- Reverse — turn your own writing into natural English
Set it once for the work you actually do, and from then on it’s just select and press. No prompt to type each time.
Someone reading technical docs daily sets it to translate. Someone tracking foreign news sets it to summarize. Someone in contracts sets it to simplify. Same shortcut, genuinely different tool per person.
Fifteen seconds to one changes how you read
Framing this as a time saving undersells it. What actually changes is your reading behavior.
When looking something up is expensive, you unconsciously ration it. You skip sentences you mostly got. You move on from the ones you’re 80% sure about.
Those 80%s compound. By the end of the document your understanding is far vaguer than it felt. In technical writing you find out when the implementation misbehaves. In a contract, when someone disputes your reading. In a paper, after you’ve already cited it.
At one second per lookup, you can afford to check every sentence that gave you pause. The “is this worth interrupting myself for?” calculation disappears. It’s the same shift as moving from a paper dictionary to an electronic one: make the tool cheap enough and people simply use it more.
More lookups, quietly better comprehension.
Anything living in a browser tab is far away
You could paste into ChatGPT instead. People try. It doesn’t stick.
The reason is mundane: things inside the browser get lost among the other things inside the browser. The doc you’re reading, the spec you’re referencing, the admin console, Slack, the calendar. Add a translation tab to that row and it stops being something you open and becomes something you look for.
MacSide AI is a side-panel Mac app, so the panel layers over your screen rather than living in the tab strip. Nothing to hunt for. The page you were reading stays where it was.
Read the answer, dismiss it, keep going. The goal is a state where consulting AI isn’t an interruption.
How it compares to DeepL Pro — and what it costs
DeepL is the reference point for translation quality, and this isn’t an argument for replacing it.
The differences are where it lives and what else it can do.
DeepL is built for translation. Output quality comes first, and it has whole-document translation, file translation, and glossaries to match. For translating a document end to end, the dedicated tool is the right tool.
⌘C+C is for pulling one sentence while you’re still reading. It isn’t a bulk translator. In exchange, changing the prompt turns it into something other than a translator entirely.
| DeepL Pro | MacSide AI Pro | |
|---|---|---|
| Monthly | from $8.74/mo | $2.99/mo |
| One-time | Not offered | $59.99 |
| Strength | Output quality, whole documents | One sentence mid-read, custom prompts |
| Scope | Translation only | Translation is one of many features |
A year of DeepL Pro runs past $100. MacSide AI’s one-time purchase is $59.99 and also includes AI chat, clipboard management, OCR, screenshots, screen recording, image compression, and Mac cleanup.
To be straight about it: if you’re comparing translation quality alone, DeepL is the more consistent output. If translation is central to your job, or you need whole contracts rendered, stay with the dedicated tool.
But if you just want to pull the occasional sentence while reading, paying a translation subscription every month for that is a lot. For that case, ⌘C twice is enough.
Where it earns its keep
- Reading technical documentation and API references
- Hitting an untranslated settings label in a foreign-language app
- Following GitHub issues and release notes
- Deciding from an abstract whether a paper is worth reading
- Checking the one clause in a terms page that bothers you
- Reading an email where the phrasing carries something unstated
Where it doesn’t fit: translating whole documents. If you need a full page rendered, hand the file to a dedicated service. ⌘C+C is for one to a few sentences, mid-read.
Frequently asked questions
Can it do things other than translate?
Yes. The instruction it runs is configurable — translate, define, summarize, simplify, or reverse-translate into English. The video shows it set to explain a term.
Which apps does it work in?
Anywhere you can select text: browsers, PDF viewers, mail clients, editors. It isn’t tied to a particular app.
Can I ask a follow-up?
Yes — the panel has a follow-up control, so “go deeper” or “give me an example” happens in the same place without opening anything else.
Can it replace DeepL?
Depends on the job. For pulling sentences while reading, it’s sufficient. For bulk document translation, glossaries, or when output quality is critical, DeepL remains the better fit.
Does pressing ⌘C twice break normal copying?
No — it’s designed as an extension of copy. Regular copy behaves normally; the AI only triggers on the double press.
Don’t stop reading
Reading in a second language isn’t slow purely because of vocabulary. A large part of it is that every lookup interrupts the reading itself.
Leave the page once per sentence and the thread breaks each time. Break the thread enough and you understand every sentence individually while retaining nothing as a whole.
⌘C twice. Panel opens. Read. Dismiss. Continue.
That brevity isn’t just about speed — it’s a design aimed at not stopping the act of reading. You stay in the document and resolve only the parts that stopped you. The more foreign-language reading sits in your day, the more that difference compounds.