| Slovak confused with Czech | Mutually intelligible is not identical. A Czech rendering misses Slovak spelling, endings and the norm — and, for Slovak authorities, the brief. | We translate exclusively into standard Slovak by native speakers, never as a Czech stand-in. |
| Diacritics ľ ĺ ŕ ô ä, ď ť ň | Slovak-specific letters get flattened to Czech or plain Latin, changing words and names on a certificate. | The full Slovak diacritic set is preserved and names matched to the passport. |
| Rhythmic law (vowel shortening) | Slovak avoids two long syllables in a row, shortening endings where Czech would not. Ignored, forms read non-native. | The rhythmic law is applied, so grammar and endings read as native Slovak. |
| Female surnames -ová | Female surnames usually take -ová. Dropped or added wrongly, the name no longer matches the passport holder. | The -ová form is set to match the passport exactly, not normalised away. |
| Six cases, vocative ≠ Czech | Case endings and the vocative differ from Czech. Borrowed from Czech, they are simply wrong in Slovak. | Slovak case forms are used throughout, distinct from Czech. |
| False friends DE–SK | Words that look German but mean something else slip through; in an official text that is a real error. | Terminology is checked by a native specialist, so false friends are caught. |
| Place names & exonyms | German and Slovak use different names for the same places. Mixed, a location is misidentified. | Place names are set in the form valid for the target and document. |