Dictating Formal vs Casual Register in Another Language
Writing in a second language is hard enough. Getting the tone right, formal for a boss or a landlord, casual for a friend, is where many people freeze. The good news: when you dictate instead of type, you can control register more naturally, and let on-device AI cleanup smooth out the rest.
Key takeaways
- Register comes from your word choice first: speech recognition writes what you say.
- A custom dictionary keeps polite forms, honorifics and names spelled correctly.
- Custom AI prompts can hold a tone steady, formal or casual, without changing your meaning.
- With on-device processing, dictating in any language keeps every word on your Mac.
What register is, and why it trips up second-language writers
Register is the level of formality in language. Every language draws the line differently. Some, like Japanese, Korean, German, Spanish and French, have grammatical politeness built in, such as the formal and informal you, or honorific verb endings. Others, like English, lean on word choice and phrasing instead. When you learn a second language, register is often the last thing to click, because textbooks teach the polite form and real life is a mix.
Dictation helps here in a way typing does not. When you speak, you tend to reach for the register you would actually use out loud, which is closer to how a native speaker frames a sentence. If you want a refresher on how the underlying technology turns sound into words, this overview of speech recognition is a good starting point. And if you speak more than one language day to day, it is worth knowing what languages Mac dictation supports before you start.
Mini glossary
- Register
- The level of formality in language, ranging from casual and intimate to polite and formal, shaped by word choice, grammar and context.
- Honorific
- A word form or ending that signals respect toward the listener or a third party, common in languages like Japanese, Korean and Hindi.
- T-V distinction
- The split between an informal "you" and a formal "you," such as tu and vous in French or du and Sie in German.
- AI cleanup
- An on-device pass that removes filler, fixes punctuation and grammar, and adapts tone, without uploading your text to a server.
- Custom dictionary
- A personal list of names, jargon and polite forms you add so dictation spells them the way you intend every time.
Can dictation actually hear the difference in tone?
Not on its own, and that is the honest part. Speech recognition transcribes the words you say. If you speak the formal forms, it writes the formal forms; if you speak slang, you get slang. The register lives in your mouth first. What software adds is a second, optional step: AI cleanup can take your raw speech and adjust it, tightening a casual voice note into a formal email, or loosening a stiff draft into something friendly, while keeping your meaning intact.
On BlaBlaType that cleanup is powered by on-device AI. It removes filler, fixes punctuation and grammar, and adapts tone based on a prompt you write. Because it runs locally, the rewrite happens on your Mac and nothing is uploaded. For second-language writers this is the missing piece: you supply the ideas by voice, and the tone gets a consistent finish.
Formal vs casual: how the two approaches compare
| Situation | Formal register | Casual register |
|---|---|---|
| Who it is for | Employers, officials, clients, strangers | Friends, family, close colleagues |
| Grammar you speak | Polite "you," honorifics, full forms | Informal "you," contractions, slang |
| Dictation approach | Speak the polite forms deliberately | Speak naturally, as you would out loud |
| Custom dictionary | Add honorifics and titles | Optional, mostly names |
| AI prompt | "Keep this formal and polite" | "Keep this relaxed and friendly" |
| Common risk | Sounding stiff or over-corrected | Too casual for the reader |
The pattern is simple: decide who the reader is before you press record. That single choice drives your word forms, your dictionary and your prompt. If you are still choosing a tool, our roundup of cheap dictation alternatives and the fuller best dictation software for Mac guide both flag which apps offer prompts and dictionaries.
A five-step workflow for controlling register
Pick the reader first
Before recording, decide if this is a boss, a client or a friend. That single decision sets your formality and every step below.
Set your dictation language
Choose the language you will speak so the on-device model transcribes accurately. BlaBlaType covers 90+ languages, with optional translate as you speak.
Load a custom dictionary
Add honorifics, titles, names and jargon so polite forms are spelled correctly instead of guessed. This matters most for formal writing.
Write a tone prompt
Give the AI a short instruction like "keep this formal and polite" or "make this relaxed and friendly, fix grammar, do not change the meaning."
Speak, then read it back
Dictate into your app, let the on-device cleanup run, and reread once. You will catch anything that landed too stiff or too loose.
Dictate in any language, keep the tone yours
90+ languages, on-device AI cleanup, custom prompts and a custom dictionary. Your voice and text never leave your Mac. No card needed for the trial.
Download for macOSWhy on-device matters when you write across languages
Second-language messages are often the most personal ones: a note to a landlord abroad, a work email in a language you are still learning, a message to family. Sending that audio to a cloud service to be transcribed is exactly when privacy matters most. BlaBlaType runs both the speech recognition and the AI cleanup locally, using on-device models. Your audio and transcripts stay on the Mac.
The models themselves are capable. Local speech recognition on Apple Silicon uses systems in the Whisper and Parakeet family, and if you want the background, this explainer on Whisper covers how multilingual recognition works. There is also a practical speed angle: most people speak around three to four times faster than they type, which is a real advantage when composing in a language you type slowly in. You can see the full feature and plan breakdown on the pricing page, and for more picks aimed at learners, our guide to the best dictation apps for non-native speakers goes deeper.
Frequently asked questions
Can voice to text tell the difference between formal and casual register?
Speech recognition writes down what you say, so the register comes from your own words first. On-device AI cleanup can then adjust tone if you tell it to, for example rewriting a message to be more formal or more relaxed while keeping the meaning.
How do I dictate polite or formal language in another language on Mac?
Speak the formal forms you want, such as the polite you or honorifics, and add those words to a custom dictionary so they transcribe correctly. Then use a custom AI prompt to keep the tone formal and fix grammar, all on-device.
Does BlaBlaType support languages other than English?
Yes. BlaBlaType handles 90+ languages with on-device speech recognition and optional translate as you speak, so you can dictate in a second language and keep every word on your Mac.
Will AI cleanup change my meaning when it adjusts tone?
Good AI cleanup adjusts wording and politeness without inventing facts. It removes filler, fixes punctuation and grammar, and adapts tone. You stay in control by writing a prompt that says what to preserve and what to change.
Is my voice uploaded when I dictate in another language?
With BlaBlaType, no. Speech recognition and AI cleanup run 100% on-device on your Mac. Your audio and transcripts never leave the machine, regardless of the language you dictate in.