| č vs. ć (and dž vs. đ) | Croatian distinguishes hard č from soft ć, and dž from đ. In a name this decides identity: Jelačić is not Jelačič, and an đ is not a dj. | Native speakers set č/ć and dž/đ character-exactly; on certificates the spelling is checked against the source and the passport. |
| Croatian ≠ Serbian/Bosnian | Mix in Serbian vocabulary, ekavian forms or leftover Cyrillic and you produce a text Croatian authorities and readers instantly recognise as "not Croatian". | We translate exclusively into standard Croatian (ijekavian, Latin) — never into a blended variety. |
| ijekavian instead of ekavian | The jat reflex separates the standards: Croatian mlijeko, vrijeme, dijete — not mleko, vreme, dete. The wrong reflex marks the text as foreign at once. | The ijekavian standard form is held throughout — in running text as in terminology and names. |
| Seven cases including the vocative | Croatian has seven cases and no article; the vocative is a form of its own (Ivan → Ivane!). Transferring German article-and-sentence patterns 1:1 yields un-Croatian sentences. | We write from the target language, with correct case and vocative forms rather than passed-through German structures. |
| Verbal aspect (svršeni/nesvršeni) | Every verb has a perfective and an imperfective aspect. "He signed" (once, completed) and "he signed regularly" need different verbs — in contracts a difference in meaning. | The aspect is chosen deliberately, so the one-off or ongoing nature of an action is rendered correctly in law. |
| German & Italian place names | Older certificates carry German or Italian place names: Agram = Zagreb, Fiume = Rijeka, Zara = Zadar, Ragusa = Dubrovnik. | Historical exonyms are mapped to today's official Croatian place name, with a note where the document requires it. |
| "stalni sudski tumač" ≠ "ermächtigter" | Croatia appoints its own permanent court interpreters (stalni sudski tumač) via the county courts. A German certification does not automatically count there — and vice versa. | We clarify in advance where the document applies and set the right form: a certified translation for Germany/Austria, or the route via a sudski tumač for Croatia. |