Fed. R. Evid. 604 — Interpreter
Plain English
An interpreter is treated like an expert witness—they must be qualified—and must take an oath or affirmation to translate truthfully.
From the Courtroom
When a witness needs an interpreter, the interpreter’s qualifications and oath are foundation you should establish, or challenge, on the record. A poor or biased translation can quietly distort testimony; if accuracy is contested, you can call your own interpreter to challenge the rendering.
Key Points & Authority
- Qualification. The interpreter must be qualified, on an expert-like showing.
- Oath. Must give an oath or affirmation to make a true translation.
Florida Parallel
Florida Parallel: Fed. R. Evid. 604 corresponds to § 90.606, Fla. Stat. (Interpreters and translators). Both require a qualified interpreter under oath to translate truthfully. Cross-reference is text-only for now; live links added in a later interlinking pass.
About this rule walkthrough
Part of The Evidence Code, hosted by John M. Phillips — Board Certified Civil Trial Lawyer, Court TV analyst, admitted in 8 states + 9 federal districts + SCOTUS.
Free consultation: (904) 444-4444 · About John Phillips
Educational only — not legal advice.
Rule Text (verbatim from the Florida Supreme Court)
An interpreter must be qualified and must give an oath or affirmation to make a true translation.
Educational reference. Educational summary of the Federal Rules of Evidence, not legal advice.
What this rule means in plain English
An interpreter is treated like an expert witness—they must be qualified—and must take an oath or affirmation to translate truthfully.