Formal vs Informal Speech: Which Should You Learn First?

Sooner or later, every beginner in Portuguese, German, Japanese, Korean, and many other languages runs into the same fork in the road: there's more than one way to say “you”, and more than one way to talk to a person, depending on who they are. Portuguese has tu and você; German has du and Sie; Japanese and Korean have whole systems of polite and casual speech. Pick the wrong one and you might sound rude without meaning to — which is a genuinely worrying thought when you can barely form a sentence.

So which do you learn first? The short answer is: start polite. This guide explains why the formal or neutral-polite form is almost always the safer default for a beginner, how the two-way “you” split works, how Japanese and Korean go further, and — importantly — why you shouldn't let this stop you from speaking. Getting this right early saves you from a surprisingly common source of accidental offence.

Why polite is the safer default

When you're not sure which register to use, being slightly too polite is a small, forgivable error, while being too casual can be a real one. Address an older stranger or a shopkeeper with the informal form and you risk sounding presumptuous; address a friend with the formal form and you sound, at worst, a little stiff for a moment before they wave it off. Because the cost of the two mistakes is so lopsided, the sensible starting strategy is to lean formal and relax later. As one language academy puts it, focusing on formal speech first is wise because it “unlocks the gates to professional settings, where respect and politeness are particularly important” (Polyglottist Language Academy).

There's a practical bonus, too: polite forms are usually what you'll hear in the wild anyway — in shop exchanges, station announcements, customer service, and most textbooks and courses. That means the polite form isn't just safe, it's also the version you'll get the most exposure to and be able to reuse in the widest range of real situations. Learning it first gives you a foundation that works almost everywhere, which is exactly what you want when you're starting out and can't yet read the social subtleties that tell a native speaker when to switch. It pairs naturally with learning the first survival phrases in a new language, which are themselves best learned in their polite form.

The two-way “you”: tu, você, du, Sie

Many European languages make a split linguists call the T-V distinction: an informal “you” and a formal “you”, named after Latin tu and vos. It appears as tu vs você in Portuguese, tú vs usted in Spanish, tu vs vous in French, and du vs Sie in German. English speakers find this genuinely alien because English collapsed both into a single “you” centuries ago, so we have no instinct for it and have to learn it deliberately rather than feel it.

The good news is the decision usually comes down to three readable factors: the person's age relative to you, how well you know them, and the setting. Peer your own age you've met before, in a relaxed setting? Informal. Older person you don't know, in a formal or professional context? Formal. When at least two of the three point toward formality, use the formal form. It's worth knowing that usage varies by region — Brazilian Portuguese leans heavily on você as an everyday default while European Portuguese keeps tu for the familiar — which is one of several differences covered in our guide to European vs Brazilian Portuguese.

Japanese and Korean go further than two levels

In Japanese and Korean, formality isn't a choice of pronoun so much as a choice of verb ending, and there are more than two levels. Japanese beginners are almost universally taught the polite -masu / desu style first, because it's appropriate across the widest range of everyday situations and rarely wrong. Below it sits the plain or casual form used with friends and family, and above it sits keigo — honorific and humble speech — which is an advanced layer for business and formal settings. A beginner guide sums up the priority order plainly: master polite speech first, because it’s the register that keeps you safe while you learn to hear the others (Speechling).

Korean works on the same principle: the polite -yo endings are the beginner default, with a casual style for close peers and higher honorific forms reserved for elders and formal contexts. In both languages, reaching for casual speech with the wrong person is the error that can actually cause offence, so the everyday polite level is both the easiest to use correctly and the hardest to get badly wrong. If you're starting one of these languages, this fits into the wider roadmap in how to start learning Japanese and how to start learning Korean from scratch.

How to actually learn the switch

Knowing that polite comes first doesn't tell you how to internalise when to switch — and the honest answer is that you learn it mostly by exposure, not by memorising a rulebook. Every time you notice how a character in a show speaks to their boss versus their best friend, or how a shopkeeper addresses a customer versus a colleague, you're absorbing the social pattern behind the grammar. This is why input matters so much here: the register rules are lived social behaviour, and watching and reading real interactions teaches them in a way a table of endings never quite does.

A simple starting method is to learn each key phrase in its polite form first, get comfortable using it, and only then learn its casual twin once you've seen it used and can tell who it's for. Don't try to master every level at once; stack them one at a time on top of the polite base. And pay attention to the gap between how textbooks present speech and how people actually talk, because casual registers in particular are full of contractions and shortcuts — something we dig into in why real speech sounds different from textbooks. Exposure closes that gap far faster than study alone.

Don't let register anxiety keep you silent

Here's the reassurance beginners need most: native speakers are remarkably forgiving of formality mistakes from an obvious learner. They can see you're new, and a slightly-off register from someone visibly still learning almost never lands as an insult — especially once you can say a simple “sorry, I'm still learning.” The people most likely to be offended by informal speech are those who don't realise you're a beginner, and your accent and hesitation usually make that obvious before you've finished the sentence.

So use register as a default to aim for, not a wall to hide behind. Start polite because it's the safest bet, add casual as you gain a feel for it, and accept that you'll occasionally pick the wrong one — that's a normal part of learning a social skill, and it's how you calibrate. The alternative, staying quiet until you're certain, costs you far more than the odd misjudged “you” ever will. The same logic runs through starting to speak as a beginner: communicate first, refine the politeness as you go, and let real conversations teach you the rules that no chart fully captures.