Který vs. Jaký: The Czech “Which?” Trap (And How to Stop Falling Into It)
If you’ve ever said something like Jaký je tvůj byt? when you meant Which apartment is yours?, welcome to one of the most common Czech learner mistakes.
In English, “what” can cover a lot. In Czech, jaký and který split the job into two very different questions:
jaký = what kind / what is it like (quality, type, description)
který = which one (identity, selection from options)
Once you see the logic, it becomes surprisingly consistent.
The one-sentence rule
Jaký = description
You want an adjective-type answer (nice, big, expensive, weird, Czech…).
Jaký je ten film? “What is that movie like?”
Jaký máš byt? “What kind of apartment do you have?”
Který = selection
You want to identify the correct one from a set of possibilities.
Který film chceš? “Which movie do you want?”
Který byt je tvůj? “Which apartment is yours?”
Jaký: “What is it like?” / “What kind?”
Use jaký when you’re asking about:
quality
appearance
character
type/category
overall description
You’re basically asking: Describe it.
Typical answers to jaký:
adjective: good, small, modern
“it’s + adjective”
“it’s like…”
Examples:
Jaký je ten pokoj? “What is that room like?”
Ten pokoj je malý. “That room is small.”
Jaká je ta kniha? “What is that book like?”
Ta kniha je výborná. “That book is excellent.”
Jaké je dneska počasí? “What’s the weather like today?”
Je docela hezky. “It’s pretty nice.”
Jaký je nový šéf? “What is the new boss like?”
Je přísný, ale férový. “He’s strict but fair.”
Jaká je čeština? “What is Czech like?”
Čeština je těžká, ale krásná. “Czech is hard but beautiful.”
Jaký also means “what kind of…”
Jaký čaj chceš? “What kind of tea do you want?”
Zelený. “Green.”
Here you’re choosing a type (green/black/mint), not identifying which specific cup.
Který: “Which one?” / “Which (specific)”
Use který when the listener is choosing or identifying something from:
a visible set
a known list
several options
“this one or that one?” situations
You’re basically asking: Which one exactly?
Examples:
Který den je dnes? “Which day is it today?”
Dnes je pátek. “It’s Friday today.”
Která tramvaj jede do centra? “Which tram goes to the center?”
Sedmnáctka. “Number 17.”
Které auto je tvoje? “Which car is yours?”
To modré. “The blue one.”
Kterou cestou půjdeme? “Which way will we go?”
Tudy. “This way.”
Který z těch filmů chceš vidět? “Which of these movies do you want to see?”
Tenhle. “This one.”
The easiest way to decide: Am I describing or identifying?
You want a description → jaký
Jaký je ten hotel? “What is that hotel like?”
Je drahý, ale krásný. “It’s expensive but beautiful.”
You want identity from options → který
Který hotel je váš? “Which hotel is yours?”
Ten napravo. “The one on the right.”
If you can add “out of these” in your head, it’s almost always který.
Který chceš (z těchto možností)? “Which one do you want (out of these options)?”
Minimal pairs (same noun, totally different meaning)
These pairs are gold because they show the contrast clearly.
Film
Jaký je ten film? “What is that movie like?”
Který film myslíš? “Which movie do you mean?”
Room
Jaký je ten pokoj? “What is that room like?”
Který pokoj je váš? “Which room is yours?”
Teacher
Jaký je váš učitel? “What is your teacher like?”
Který učitel to řekl? “Which teacher said it?”
Restaurant
Jaká je ta restaurace? “What is that restaurant like?”
Která restaurace je otevřená? “Which restaurant is open?”
The mistake learners make (and why)
The classic error:
Using jaký when you actually need which one.
Wrong idea:
Jaký vlak jede do Prahy? “What kind of train goes to Prague?”
This sounds like you’re asking about the train’s style (fast? modern? comfortable?).
What you probably mean:
Který vlak jede do Prahy? “Which train goes to Prague?”
More common examples:
Jaký autobus jede na letiště? “What kind of bus goes to the airport?”
Který autobus jede na letiště? “Which bus goes to the airport?”
Jaký je tvůj kufr? “What is your suitcase like?” (size/color/brand)
Který je tvůj kufr? “Which suitcase is yours?” (pointing at a pile)
Real-life situations where it matters
At a café
Jakou kávu chceš? “What kind of coffee do you want?”
Kterou kávu chceš? “Which coffee do you want?” (e.g., pointing at two prepared cups)
Jaký dort si dáš? “What kind of cake will you have?”
Který dort je tvůj? “Which cake is yours?”
At the pharmacy
Jaký lék potřebujete? “What kind of medicine do you need?”
Který lék jste už zkoušel/a? “Which medicine have you tried already?”
Apartment hunting
Jaký je ten byt? “What is that apartment like?”
Který byt chcete? “Which apartment do you want?”
Talking about people (very common)
Jaký je Petr? “What is Petr like?”
Který Petr? “Which Petr?” (because there are multiple)
Quick cheat-sheet you can memorize
Use jaký when the answer is an adjective:
Jaká je ta polévka? “What is the soup like?”
Je slaná. “It’s salty.”
Use který when the answer is an identifier:
Která polévka je vaše? “Which soup is yours?”
Ta vlevo. “The one on the left.”
Don’t Forget: They Change According to Gender
Both jaký and který behave like adjectives. That means they must agree with the noun in:
gender
number
case
If you change the noun, you must change the form.
Masculine
Jaký film chceš vidět? “What kind of movie do you want to see?”
Který film chceš vidět? “Which movie do you want to see?”
Feminine
Jaká kniha je nejlepší? “What kind of book is the best?”
Která kniha je tvoje? “Which book is yours?”
Neuter
Jaké město se ti líbí? “What kind of city do you like?”
Které město je největší? “Which city is the biggest?”
Plural
Jaké filmy máš rád? “What kind of movies do you like?”
Které filmy chceš vidět? “Which movies do you want to see?”
Jaké restaurace jsou dobré? “What kind of restaurants are good?”
Které restaurace jsou otevřené? “Which restaurants are open?”
It Also Changes in Other Cases
Because these words decline, their form changes in real sentences.
Accusative (feminine example):
Jakou knihu čteš? “What kind of book are you reading?”
Kterou knihu čteš? “Which book are you reading?”
Instrumental:
S jakým člověkem pracuješ? “What kind of person are you working with?”
S kterým člověkem pracuješ? “Which person are you working with?”
Tip: See the declension tables for jaký and který.
Why This Matters
Students often learn:
jaký = what
který = which
But that’s not enough. You also have to think:
Is it masculine, feminine, or neuter?
Is it singular or plural?
What case is it in?
That’s why you’ll see forms like:
jaký / jaká / jaké / jakou / jakým
který / která / které / kterou / kterým
They’re not random — they follow normal adjective patterns.
Mini practice (with answers)
Choose jaký/jaká/jaké or který/která/které:
___ film chceš dneska vidět?
___ je ten film?
___ tramvaj jede na Hlavní nádraží?
___ je to město?
___ z těch dvou je tvoje?
Answers
Který film chceš dneska vidět? “Which movie do you want to watch today?”
Jaký je ten film? “What is that movie like?”
Která tramvaj jede na Hlavní nádraží? “Which tram goes to the Main Station?”
Jaké je to město? “What is that city like?”
Který z těch dvou je tvoje? “Which of the two is yours?”
If you remember only one thing:
jaký asks for a description
který asks for the right one
And if you’re ever unsure, ask yourself: Do I want an adjective… or do I want someone to point?
If you want, I can also write a short follow-up post just on tricky edge cases (like Jaký den? vs Který den? in different contexts) with even more real-life dialogues.
