Why People Switch to English on You, and How to Stop It

You understood their answer without effort. That's the part that stings.

If you're somewhere past beginner - you can build sentences, you can follow a conversation, you've put in years - this is probably the single most demoralising thing that happens to you.

This guide is about what the other person is actually responding to, and a ten-minute daily exercise that changes it. It takes two to three months. I'm going to be honest with you.

Part 1: What the switch is responding to

It happens too fast to be about your grammar. The switch comes after a sentence and a half. Two, if the person is patient.

Nobody is assessing your subjunctive in that window. Nobody has noticed your gender agreement. The decision arrives before any of that could have been processed.

So whatever triggers it, it isn't your knowledge of the language.

What it is responding to is effort

All of us adjust our speech constantly, in every language, including our first. You slow down or speak louder for your grandmother. Slang disappears in a job interview. You simplify for a child and you don't announce that you're doing it. We always pick whatever version of our speech makes the exchange run smoothly.

Your listener is doing exactly this. When your sentences arrive with gaps in the middle while you assemble the next piece, or when your sounds take an extra beat to identify, the exchange stops running smoothly. So they move to the language that costs less effort.

Two things drive the cost:

Speed. How long a finished sentence takes to leave your mouth, including the pauses inside it.

Articulation. How much work your listener does to identify which sounds you produced.

Neither is knowledge. You can know a great deal about French and still be expensive to listen to.

Why this distinction matters

These two problems have different solutions, and the intuitive response solves the wrong one.

If you walk home from the café and conclude, reasonably, that you need more French, then you add a podcast. You start a series with subtitles. You reinstall the grammar app you deleted in March.

Your comprehension climbs... but your production speed stays exactly where it was, because you produced nothing. 

Moreover, being switched on is unpleasant, so you speak a little less. You let someone else order. You send the email instead of making the call. The frequency of the single activity that would help you goes down at exactly the moment it needed to go up.

Part 2: Writing Out Loud

Here is the exercise. It takes about ten minutes. It looks too simple to be worth doing, which is the main reason people abandon it.

Step 1 - Pick a sentence you'll actually need this week

Not a topic from a textbook. Something you would genuinely say to a specific person in the next seven days. Could you name the person you'd say this to? If not, discard it and pick again.

Step 2 - Say it out loud before you write anything

At speaking volume. Before your pen touches the paper. Saying it first is crucial (and it's tiring).

Step 3 - Write it down

Now you've produced the same sentence twice, through two different channels.

Writing slows you down enough to notice what your mouth glossed over. You'll catch a missing article, a verb you guessed at. Fix it and say the corrected version aloud.

Step 4 - Say it again until it comes out in one piece

And again. And again.

You're finished with a sentence when it comes out at normal speed with no gap in the middle where your brain goes searching for the next word.

That gap is the trigger. Everything else in this guide aims at removing it.

Step 5 - A handful of sentences a day, for two to three months

Not an hour on Sunday. A few sentences most days.

Frequency is the variable that matters here, and it's the one people substitute intensity for. An hour on Sunday and nothing until the following Sunday produces almost nothing.

What you're actually doing

Moving the work you need to put all the pieces together off the conversation and onto your notebook, where you have unlimited time and nobody is waiting.

Then, in the café, you're not building the sentence. You're retrieving one you already built. It arrives whole, at speed, and your listener never enters the state where switching costs them less.

Over two or three months you accumulate a stock of these.

Producing a sentence is the only way to find out what you can't say. This is why the exercise feels harder than an hour of input despite taking a sixth of the time.

Part 3: A four-week structure

A note on what this is: the exercise above comes from what I give people directly and what I've watched work. The week-by-week structure below is a scaffold I've built for this guide, to give you something concrete to follow. Treat it as a suggestion, not a tested protocol. If it fights with your life, keep the exercise and drop the schedule.

Week 1 - Five sentences, one situation. Pick a single recurring situation: your commute, the school gate, one colleague. Write five sentences you may need. Rehearse the same five all week.

Week 2 - Same five, plus five new ones. Return to week one's sentences first, cold, before looking at them. The ones that arrive whole are done. The ones that stall go back into rotation.

Week 3 - Introduce a second situation. You should now be able to feel the difference between a sentence you've built and one you're assembling live.

Week 4 - Use three of them for real. Choose three you've rehearsed and place them in a real conversation this week. Then note whether the person stayed in the language.

Then repeat the cycle. 

Part 4: Pronunciation vs flow

If articulation is what's costing your listener, you are structurally the worst-placed person to detect it. Your ear knows what you meant.

Your phone's dictation

The setup, exactly:

1. Add your target language to your phone's keyboard
2. Open any notes app and switch the keyboard to that language.
3. Tap the microphone.
4. Say your rehearsed sentence at normal speed.

If the phone writes something you didn't say, you've located the exact difficulty your listener had. The phone won't switch to English. It just gets it wrong.

Do this with the sentences you're already rehearsing. 

Microsoft Reading Coach

coach.microsoft.com — free. You read a passage aloud and it flags the words you mispronounced.

Part 5: When it stalls

Three ways this goes wrong, in the order I see them.

Your sentences are too ambitious. If a sentence takes four minutes to build, it's not a sentence you'll ever retrieve at speed. Cut it in half. Two short sentences that arrive whole beat one complex one that arrives in pieces.

You're writing without saying. The silent drift back to writing-only will definitely happen. Check yourself: are you still saying it aloud before you write? If you've ìstopped, you're doing a different, weaker exercise.

You rehearse but never deploy. Sentences that stay at the kitchen table don't transfer on their own. Week four of the structure above exists specifically to prevent this.

Part 6: Asking someone to stay in the language

You can just ask. People rarely do, and it works more often than you'd expect:

"Ça vous dérange si on continue en français ? J'ai besoin de pratiquer et je comprends bien, c'est juste que je parle lentement."

"Would you mind if we stayed in French? I need the practice. I understand fine, I'm just slow."

The reason this specific phrasing helps: it tells them you're not struggling to follow, which is one of the things they were trying to solve by switching.

However, if your sentences still arrive in pieces, the effort cost is still there, and they'll drift back to English anyway within a few exchanges. Asking buys you the room. The exercise is what lets you keep it.

Part 7: What to honestly expect

I'm not going to give you a timeline with numbers in it, because I don't have one that's real.

The first two weeks feel pointless. There's no streak. Most people who quit, quit here.

Somewhere in the second month, the sensation changes.

The switch most likely will stop being universal before it stops entirely. It'll happen with the tired shop assistant and not with the neighbour who has time. We all need some patience.

Where to get your sentences read

Everything above works better with someone reading what you write and interacting. That's the whole design of the Frequency Circle - you write, and every entry gets a response from me. There's a free week trial, and I run small meetings a few times a month depending on demand and language. If you want something more targeted such as one-on-one help and feedback through WhatsApp, you can always try it two weeks for free and decided whether to upgrade later.

[Join the Frequency Circle →]