| A missing accent | Drop the accent and the sense tips over: e (and) becomes è (is), papa becomes papà. In an official text that is an error, not a nuance. | Accents are set correctly and names matched character-for-character to the passport. |
| Gender agreement | Grammatical gender governs the article, the adjective and — with essere — the past participle. A wrong gender ripples through the sentence. | We write from the gender of each noun, so article, adjective and participle agree throughout. |
| The polite form | Italian marks courtesy with the capitalised Lei and third-person verb forms. Miss it and a formal letter reads as too familiar for an authority. | Register and courtesy forms are set for the document type — formal where an office expects it. |
| Legal forms and institutions | A GmbH is not an Srl or SpA; a Landgericht is not a tribunale of the same order. Swap the institution and the document misstates the legal reality. | Company forms, courts and offices stay demonstrable, with an explanatory equivalent where needed — never silently replaced. |
| Numbers, decimals and dates | Italian uses the thousands dot and the decimal comma: 1,000,000.50 becomes 1.000.000,50, and the date is day-first. Left in the English pattern, figures are misread. | Number, decimal and date formats are converted to the Italian convention, so amounts and dates cannot be misread. |
| Capitalisation rules | Months, weekdays, languages and nationality adjectives are lower-case in Italian (lunedì, italiano). English or German capitalisation looks wrong to a native reader. | Capitalisation follows Italian rules, so the text reads as written by a native. |
| Standard vs Swiss Italian | Swiss administrative Italian differs from Italy's in wording and terminology. Italy Italian sent to a Ticino office reads as foreign, and vice versa. | We set the variety of the target country in wording and terminology — Italy or Switzerland. |