A translation can be fluent while changing the meaning. Test a short passage with names, numbers, dates, negation, and a phrase whose tone matters. Compare the result with a trusted human reference, then try a longer passage to see whether terminology stays consistent across paragraphs.
Keep product names, code, URLs, and placeholders unchanged when the task requires it. For sensitive text, review the service's data handling before uploading it. A useful report gives source and target languages, the exact sentence that changed meaning, the expected interpretation, and the returned translation; avoid treating one awkward stylistic choice as the same problem as a factual reversal.