Use when translating or localizing UI strings, marketing copy, documentation, or any source text into Czech (cs). Czech is NOT Slovak — enforces Czech vocabulary (soubor, uživatel, složka), letters ě ř ů, 7-case grammar with vocative, 3 genders with animate/inanimate split, ICU one/few/other plurals, perfective/imperfective aspect, Vy/ty formality, impersonal status voice (never first-person Počítám), neuter perfective participle for completion (Uloženo), infinitive buttons, and CZK (1 234,56 Kč).
