A handful of words does most of the talking.

Language is wildly top-heavy

In the 1930s the linguist George Zipf noticed something that has held up ever since: in any language, a tiny number of words are used constantly, while the vast majority are used almost never. Word frequency doesn't tail off gently — it falls off a cliff. The most common word in a language can appear twice as often as the second, three times as often as the third, and so on down a very long, very thin tail.

The practical consequence is striking. You don't need most of a language to handle most situations in it — you need the right small slice of it.

Those coverage figures come from vocabulary research into general language comprehension. We don't claim a study tested our exact phrase list — but the principle behind it is the same one we build on: concentrate effort where the payoff is, and ignore the long tail.

Where most courses lose you

Traditional courses and the big streak-driven apps are built to chase fluency — grammar, conjugation, the lot. A noble goal, and a slow one. Along the way they spend your time on vocabulary you'll almost never reach for: colours, farmyard animals, "the boy eats an apple," verb tables you'll have forgotten before passport control. We're a different kind of language app — we go straight for what you'll actually say.

For a traveller, that's effort spent in the long thin tail — the 95% of a language you won't use on a four-day trip. We call our test for keeping it out the "no giraffes" rule: if you wouldn't genuinely need it on the ground, it doesn't make the cut.

Fluency is a wonderful project for a year. It is the wrong tool for a long weekend in Lisbon.

What earns a place instead

Frequency alone isn't enough — "the" is common but useless on its own. So every phrase we include has to survive five filters. Together they turn "what's common" into "what a traveller can actually use, fast, under pressure."

• Situation frequency. How often will a traveller actually land in the moment this phrase is for?
• Standalone utility. Does it do a real job on its own, without three other sentences propping it up?
• Recall under pressure. Can you summon it in 2–3 seconds at a counter, a kerb, a ticket gate?
• Cross-country universality. Does it travel — useful across places, not just one café in one town?
• Non-substitutability. If a gesture or a single other word would do, this one doesn't need to be here.

Then we make each one stick. Every phrase comes with a vivid, slightly cheeky mnemonic image — gracias becomes "grassy arse," a donkey with a grassy backside — because a picture you can't un-see beats rote repetition for recall when you're put on the spot. Clever, never childish.