Why Your Translated Campaign Won’t Sell in Czech
- Translation is not localization. A grammatically correct Czech page can still read as foreign, target the wrong keyword forms and address the customer in the wrong tone, and it converts like it.
- Czech has seven grammatical cases. The same product word changes shape depending on its role in the sentence, so a keyword list translated to dictionary forms misses how Czechs actually search.
- You must choose
vyorty. Czech forces a formal-versus-informal decision on every “you”, a brand-voice choice English does not have. - The stakes are commercial: 76% of consumers prefer to buy in their own language and 40% will never buy from a website in another (CSA Research, 2020). In Czechia, native copy is revenue infrastructure.
The mistake almost every entrant makes
You send your winning English campaign to a translation agency, get back grammatically flawless Czech, and launch it. The numbers disappoint. Clicks are fine, conversions are not. The instinct is to blame the channel or the price. Usually the real problem is that you translated when you needed to localize.
Translation reproduces meaning. Localization rebuilds the message so it works in Czech: the right keyword forms, the right level of formality, a length that actually fits your buttons, and copy that sounds like a Czech company wrote it rather than a foreign one that hired a translator. For decision-makers, the distinction is the difference between paying for traffic that converts and paying for traffic that bounces.
“76% of online shoppers prefer to buy products with information in their native language… 40% will never buy from websites in other languages.”
Reason 1: seven grammatical cases break your keywords
Czech nouns, adjectives and pronouns change their endings depending on their role in the sentence. There are seven cases (nominative, genitive, dative, accusative, vocative, locative and instrumental), and the words around a noun shift to agree with it. English does almost none of this.
The practical consequence for marketing is search. The same product concept appears in different forms depending on how a person phrases their query, so a keyword list translated into dictionary (nominative) forms only captures part of real demand. A rough illustration for the word “shoes” (boty):
| Case / context | Czech form | Where it appears |
|---|---|---|
| Nominative (subject) | boty | “These shoes are…”, headings |
| Accusative (object) | boty / boty na běh | “I’m looking for shoes”, CTAs |
| Genitive (after prepositions/quantities) | bot | “a pair of shoes”, “kinds of shoes” |
| Locative (“about”/“in”) | botách | “reviews of…”, content queries |
A native Czech PPC specialist builds campaigns around the forms people actually type; a literal translation does not know they exist. This is also why brand and product names need a style decision: whether they stay fixed or decline, the Czech copy around them must still agree grammatically, or it reads as broken.
Reason 2: you have to choose vy or ty
Czech has two words for “you.” Vy is formal or plural; ty is singular and informal. English “you” carries neither signal, so translation software and untrained translators pick one at random, often inconsistently within the same campaign.
This is fundamentally a brand-voice decision:
Vykání(formalvy) signals professionalism, reliability and respect. The default for finance, healthcare, B2B, premium and most services.Tykání(informalty) signals friendliness, youth and accessibility. Works for youth brands, gaming, some D2C and community-driven products, and backfires if the audience expects respect.
Pick one deliberately and hold it across every touchpoint: ads, landing page, checkout, emails, customer support. A campaign that drifts between ty and vy reads as careless even when every word is spelled correctly, and carelessness is exactly the signal a foreign brand cannot afford to send.
Reason 3: Czech runs longer, and your layout doesn’t know it
Czech text is typically longer than the English source. Localization-industry planning figures put Czech at roughly 17% expansion over English, compared with the common 20–30% range for European languages (LanguageLine). That is enough to break a headline built for English, overflow a button, wrap a navigation label onto two lines or push a price out of a banner.
Designs imported from an English original routinely leave too little room for Czech. The fix is to test real Czech copy in the real layout: buttons, hero headlines, form labels, ad assets, rather than assume it will fit and discover the breakage after launch.
Reason 4: literal copy sells the wrong feeling
Even when grammar, length and formality are right, a word-for-word rendering can miss the point. Czech verbs distinguish aspect (whether an action is ongoing or completed), so a literal choice can promise a process where you meant a result, or vice versa. Slogans, wordplay and culturally loaded promises rarely survive direct translation at all; they need transcreation, where a Czech copywriter rebuilds the persuasive idea rather than the words.
Translate, localize or transcreate: what each asset needs
| Asset | Minimum approach | Why |
|---|---|---|
| Legal, T&Cs, shipping info | Translation + review | Accuracy matters more than persuasion |
| Product descriptions, body content | Localization | Native phrasing, correct terminology, keyword forms |
| Landing pages & navigation | Localization | Length, address form, search intent, layout fit |
| Ad copy, headlines, CTAs | Transcreation | These persuade; literal versions underperform |
| Slogans & brand lines | Transcreation | Wordplay and emotion don’t survive translation |
| Product feed titles (e-commerce) | Localization | Must match how Czechs search, not the English title |
What good Czech localization looks like in practice
- Keywords researched in their real inflected forms on both Google and Seznam, rather than translated dictionary words.
- One consistent form of address (
vyorty) chosen for the brand and applied everywhere. - Headlines, CTAs and slogans written natively, then pressure-tested in the actual layout for length.
- Prices in CZK, dates and formats that follow Czech conventions, product-feed titles built for Czech search.
- A final review by a native Czech speaker who was not involved in the project: the cheapest quality gate there is.
Frequently asked questions
Isn’t professional translation enough for a Czech campaign?
For legal text and body copy, often yes. For anything that persuades, such as ads, headlines, CTAs and slogans, the answer is no. Those need localization or transcreation, because a grammatically correct sentence can still target the wrong keyword form, use the wrong tone, or overflow the layout.
Can we use machine translation for Czech?
As a first draft only. Czech grammar, the vy/ty choice, keyword forms and text length all need human judgement afterwards. Machine translation gives you correct-looking Czech that a native speaker recognises instantly as foreign, which is the opposite of the trust you are trying to build.
Should we address customers as vy or ty?
Default to formal vy for finance, healthcare, B2B, premium and most services. Consider informal ty only for youth, gaming, community or deliberately casual D2C brands. Whatever you choose, apply it consistently across every touchpoint.
Do we really need a Czech version at all?
For consumer categories, effectively yes: 76% of consumers prefer to buy in their own language and 40% will never buy from a foreign-language site (CSA Research, 2020). Some B2B and enterprise segments tolerate English, but enquiry rates rise with Czech materials.
Is Slovak close enough to reuse Czech copy?
No. Czech and Slovak are separate languages. You can reuse strategy, structure and design, but not the copy itself. Slovak customers notice Czech text as much as Czechs notice Slovak.
Sources
- CSA Research — “Can’t Read, Won’t Buy – B2C” (native-language purchasing preferences; 8,709 consumers, 29 countries), 2020. csa-research.com
- LanguageLine Solutions — Guide to Translation and Localization (text-expansion index: Czech ~117 vs. English 100). languageline.com
- Karlík, Nekula, Rusínová et al. — Czech grammar reference on the seven cases, verb aspect and word order (educational summary). overview
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Discuss your Czech contentMore from the Czech Market Playbook: all 12 guides · Related: Google vs. Seznam, Content Production