Court interpreters have to recognize and render specialized vocabulary instantly, and the legal terminology for interpreters working in American courts falls into a handful of predictable categories: the titles that identify who everyone is, the words that describe how a case moves through pretrial stages, the terms that control what happens at trial, the labels attached to verdicts and sentences, the Latin phrases that still show up in daily practice, and the terms that describe the interpreter’s own modes and duties. What follows is a working vocabulary organized the way the work itself unfolds.
Interpreter and Translator Are Not the Same Title
Start with your own job title, because courts treat the two differently. An interpreter works with spoken language in real time. A translator works with written documents. In legal settings you may do both in the same hour, interpreting a witness’s testimony aloud and then performing a sight translation of a plea agreement. The qualifications, ethical obligations, and courtroom protocols shift depending on which task you are doing at that moment.
The right to an interpreter in federal court comes from the Court Interpreters Act, which requires courts to appoint one whenever a party or witness primarily speaks a language other than English, or has a hearing impairment, to a degree that would prevent them from understanding the proceedings or communicating with counsel.1Office of the Law Revision Counsel. 28 U.S. Code 1827 – Interpreters in Courts of the United States The judge must use the most available certified interpreter, or a qualified interpreter if no certified one is reasonably available. That obligation covers criminal and civil proceedings, pretrial matters, and grand jury sessions.
Titles for the People in the Case
Every participant carries a title that signals their role, and the titles shift depending on the type of case. Getting them wrong distorts the record.
Civil and Family Cases
In a civil lawsuit, the person or entity bringing the case is the plaintiff, and the person or entity being sued is the defendant. These labels appear on the complaint and stay fixed through the litigation. In family law matters and certain administrative appeals, the filing party is instead called the petitioner, and the responding party is the respondent. Both vocabularies appear regularly, sometimes in the same courthouse on the same day.
Criminal Cases
Criminal cases use different language because the government is a party. The prosecution is the public agency bringing charges against the accused.2Legal Information Institute. 34 U.S.C. 12291 – General Definitions The person charged is the defendant. “The People” or “the State” is used interchangeably with “the prosecution” in state courts, and “the United States” or “the Government” in federal courts. The defense refers to the defendant’s legal team and, by extension, the defendant’s side of the case.
Appeals
When a case moves to a higher court, the party challenging the lower court’s decision is the appellant, and the party defending the outcome is the appellee.3Legal Information Institute. Appellant These titles replace “plaintiff” and “defendant” on appeal, and they can flip: if the defendant lost at trial but wins on appeal, the original plaintiff may become the appellant in a further appeal. The focus at this stage shifts from facts to legal errors, so the vocabulary leans heavily on procedural and constitutional arguments.
Witnesses
Federal rules draw a line between types of testimony rather than types of witnesses. A lay witness can only offer opinions based on their own perception of events. An expert witness can offer opinions based on specialized knowledge, training, or experience in a particular field.4Legal Information Institute. Federal Rule of Evidence 701 – Opinion Testimony by Lay Witnesses The same person can give both kinds of testimony in a single case. Expert testimony tends to involve dense technical language, which is why preparation in advance matters.
Pretrial and Charging Vocabulary
Charging Documents
Criminal cases begin with a formal accusation. An indictment is a written charge issued by a grand jury after reviewing the prosecution’s evidence; if the grand jury finds sufficient evidence, it returns a “true bill,” and if not, a “no bill.” An information serves the same purpose but comes directly from the prosecutor without grand jury involvement.5United States Department of Justice. Indictment and Informations In federal felony cases, the Constitution generally requires an indictment, while many state systems allow prosecutors to proceed by information for less serious offenses.
Subpoenas and Summonses
A subpoena is a court-enforceable order compelling a person to testify or produce documents. A summons notifies a party that a legal action has been filed against them and that they must respond. In criminal cases, a summons can serve as an alternative to an arrest warrant, directing the defendant to appear in court on a specific date. The short way to keep them straight: a subpoena demands evidence or testimony; a summons demands a party’s appearance or response.6United States Department of Justice. Criminal Resource Manual 408 – Definitions: Judicial Subpoena, Administrative Summons and Formal Written Request
Arraignment
The arraignment is typically the defendant’s first formal court appearance on criminal charges. The judge reads the charges, advises the defendant of their rights, and asks for a plea. Decisions about bail or pretrial release are often made at this stage as well.7United States Department of Justice. Initial Hearing / Arraignment The stakes are high for interpreters here, because a defendant who does not understand the charges may enter an uninformed plea.
Voir Dire
Voir dire is the process through which attorneys and the judge question potential jurors to assess their ability to be impartial.8Legal Information Institute. Voir Dire If questioning reveals a juror cannot be fair, either side can raise a challenge for cause, asking the judge to dismiss that juror; there is no limit on these challenges. Each side also receives a set number of peremptory challenges, which allow dismissal of a juror without giving a reason.9United States District Court Southern District of New York. The Voir Dire Examination The same term also applies to preliminary questioning of a witness, especially an expert, to test their qualifications before substantive testimony.
Discovery Terms
After charges are filed or a lawsuit is initiated, both sides enter a period called discovery, during which they exchange evidence and identify witnesses.10Legal Information Institute. Discovery Within discovery, interrogatories are written questions one party sends to the other, requiring sworn written answers. Requests for production are demands for documents, electronic records, or access to property for inspection. Both tools have deadlines, and answers to interrogatories must be signed under oath. These documents are exchanged between the parties, not filed with the court.
A deposition is sworn testimony given outside the courtroom, usually in a lawyer’s office, and recorded by a court reporter.11Legal Information Institute. Deposition Attorneys from both sides question the witness, and the transcript can later be used at trial to challenge inconsistencies or to preserve testimony if the witness becomes unavailable. Despite the informal setting, everything said under oath carries the same legal weight as courtroom testimony.
A statute of limitations sets a deadline for filing a legal claim. Once the deadline passes, the claim is typically barred regardless of its merit.12Legal Information Institute. Statute of Limitations These deadlines exist for both civil and criminal matters and vary by jurisdiction and type of claim. The clock may start running from the date of the injury, the date the injury was discovered, or the date it reasonably should have been discovered.
Trial Vocabulary
Burden of Proof
The burden of proof determines how much evidence a party needs to win. In criminal cases, the prosecution must prove the defendant’s guilt beyond a reasonable doubt, the highest standard in the legal system.13Legal Information Institute. Burden of Proof In most civil cases, the plaintiff only needs to show their version of events is more likely true than not, a standard called preponderance of the evidence. A middle standard, clear and convincing evidence, applies in certain proceedings such as fraud claims and some family law matters. These phrases come up constantly in jury instructions, and each carries a different weight.
Hearsay, Sustained, and Overruled
Hearsay is an out-of-court statement offered at trial to prove that what it asserts is true.14Legal Information Institute. Hearsay The problem is that the person who originally made the statement is not in the courtroom and cannot be cross-examined, so the statement’s reliability is in question. When a lawyer objects on hearsay grounds, the judge must decide whether the statement falls within one of the recognized exceptions.
Objections drive the pace of testimony, and two words control what happens next. If the judge says “sustained,” the objection is accepted and the testimony is blocked. If the judge says “overruled,” the objection is rejected and the witness may continue. These rulings happen fast, and interpreters have to relay them immediately so the non-English-speaking participant knows whether the question stands or has been struck.
Sidebar
A sidebar is a private conversation between the attorneys and the judge, held near the bench and out of the jury’s hearing.15Legal Information Institute. Sidebar Judges call sidebars to resolve disputes about evidence, discuss sensitive matters, or address procedural issues without influencing the jury. When a defendant has a right to an interpreter, courts will sometimes require the interpreter to be present at the sidebar so the defendant is not excluded from discussions that affect their case.
Bench Trial and Jury Trial
A jury trial puts the factual decision in the hands of a panel of citizens. A bench trial eliminates the jury entirely, and the judge alone decides both the facts and the law. Bench trials tend to move faster and involve less procedural complexity, so the surrounding vocabulary shifts: no jury instructions, no voir dire, no deliberations. The judge announces a finding after hearing the evidence.
Plea Bargain
A plea bargain is an agreement in which the defendant pleads guilty, often to reduced charges, in exchange for concessions from the prosecutor.16Legal Information Institute. Plea Bargain These agreements resolve the vast majority of criminal cases without a trial. The judge must approve the deal and will typically question the defendant directly to confirm the plea is voluntary and informed. This is one of the most consequential moments for an interpreter, because a defendant who does not fully understand the terms may unknowingly waive critical rights.
Verdicts, Sentencing, and Post-Conviction Vocabulary
Verdicts
A guilty verdict means the prosecution proved its case beyond a reasonable doubt. A not guilty verdict, also called an acquittal, means the prosecution failed to meet that burden. An acquittal cannot be appealed by the government, and the defendant cannot be retried on the same charges.
When jurors cannot reach a unanimous decision, the result is a hung jury. The judge will typically send them back to continue deliberating, but if they remain deadlocked, the judge declares a mistrial.17United States Courts. Mistrial A mistrial means the trial is invalid, and the prosecution can choose to retry the case. Mistrials can also result from other fundamental errors during the proceedings.
Fines and Restitution
Sentencing often includes financial penalties, and the distinction between the two main kinds matters. A fine is money paid to the government as punishment. Restitution is money paid to the victim to compensate for actual losses caused by the crime, such as medical bills, stolen property, or lost wages. A judge can order both in the same case. Restitution orders are generally limited to the victim’s out-of-pocket economic losses; judges typically cannot order a defendant to pay for pain and suffering.
Probation, Parole, and Supervised Release
These three terms describe different types of community supervision, and confusing them can mislead a defendant about their actual situation.
- Probation is court-ordered supervision served instead of a prison sentence.18United States District Court District of South Dakota. What Is the Difference Between Probation, Parole, and Supervised Release
- Parole is supervision imposed after early release from a prison term, administered by a parole commission.18United States District Court District of South Dakota. What Is the Difference Between Probation, Parole, and Supervised Release
- Supervised release is a period of community supervision imposed by the sentencing court, served after the defendant completes a prison term.18United States District Court District of South Dakota. What Is the Difference Between Probation, Parole, and Supervised Release
The federal system largely replaced parole with supervised release in 1987, but parole still exists in many state systems. All three carry conditions, and violating those conditions can result in imprisonment.
Habeas Corpus
A writ of habeas corpus challenges the legality of someone’s detention. It does not ask whether the person is guilty or innocent; it asks whether the government has lawful authority to hold them.19Legal Information Institute. Habeas Corpus If a court finds the detention unlawful, it can order immediate release. Habeas petitions turn up in immigration detention, post-conviction proceedings, and cases involving mental health commitments.
Latin Phrases and Standard Courtroom Terms
Several Latin phrases appear often enough in American courts that interpreters need to recognize and convey them instantly. Courts do not expect a word-for-word Latin translation; they expect the concept communicated accurately.
- Pro se: a person representing themselves without a lawyer, most often seen in small claims courts and family law proceedings.20Legal Information Institute. Pro Se
- Sua sponte: an action a judge takes on their own initiative, without either party requesting it, such as dismissing a case because the court lacks jurisdiction.21Legal Information Institute. Sua Sponte
- Ex parte: a proceeding or communication involving only one side, without the other party present. Courts generally restrict ex parte contact to emergencies, such as requests for temporary restraining orders.22eCFR. 5 CFR Part 2414 – Ex Parte Communications
- Contempt of court: disobeying a court order or behaving in a way that obstructs the administration of justice. A judge can hold someone in contempt to coerce compliance (civil contempt) or to punish defiance (criminal contempt).23Legal Information Institute. Contempt of Court
- Continuance: a postponement of a hearing, trial, or other court date to a later time. Judges grant continuances when one side needs additional preparation, a key witness is unavailable, or circumstances make proceeding unfair.
Terminology for the Interpreter’s Own Job
The Three Modes
Courts use three primary interpreting modes, and each serves a different situation.
Simultaneous interpretation means speaking at virtually the same time as the original speaker. It is used whenever the non-English-speaking participant is in a passive role, such as a defendant listening to testimony, hearing arguments, or sitting through an arraignment.24National Association of Judiciary Interpreters and Translators. Modes of Interpreting: Simultaneous, Consecutive, and Sight Translation It requires intense concentration because you are processing incoming speech and producing output with almost no delay.
Consecutive interpretation involves waiting for the speaker to pause, then rendering what was said into the other language. Courts use this mode when the non-English-speaking person is actively participating, such as answering questions on the witness stand or speaking directly to the judge.24National Association of Judiciary Interpreters and Translators. Modes of Interpreting: Simultaneous, Consecutive, and Sight Translation The pace is slower and more deliberate.
Sight translation is reading a written document aloud in another language. Judges request this for plea agreements, court forms, charging documents, and written evidence during hearings.24National Association of Judiciary Interpreters and Translators. Modes of Interpreting: Simultaneous, Consecutive, and Sight Translation Unlike translating a document at a desk, sight translation happens on the spot with no time to revise.
A fourth term, summary interpretation, refers to paraphrasing and condensing what a speaker said rather than rendering it completely. Modern professional standards prohibit this method in nearly all courtroom settings, because it requires the interpreter to decide what information matters and what does not, which violates the duty of accuracy and neutrality.25National Association of Judiciary Interpreters and Translators. Summary Interpreting in Legal Settings The narrow exceptions involve discussions that do not concern the defendant’s case, overlapping conversations that make full rendering impractical, or a judge’s specific request for a summary of a document during sight translation.
Accuracy, Impartiality, and Confidentiality
Three terms describe the duties the job runs on.
Accuracy means faithfully rendering every element of the original message without adding, omitting, or paraphrasing. That includes false starts, hedges, and repetitions. If you do not hear or understand something, you ask for clarification rather than guessing, and errors must be corrected on the record as soon as you catch them.26National Association of Judiciary Interpreters and Translators. Code of Ethics and Professional Responsibilities
Impartiality requires remaining neutral throughout the proceeding. You avoid unnecessary contact with the parties, abstain from commenting on the case, and disclose any conflict of interest to the court immediately.26National Association of Judiciary Interpreters and Translators. Code of Ethics and Professional Responsibilities You are not an advocate for either side, even when you personally sympathize with one party’s situation.
Confidentiality means that privileged or confidential information you learn while interpreting cannot be disclosed without authorization.26National Association of Judiciary Interpreters and Translators. Code of Ethics and Professional Responsibilities This applies with particular force to attorney-client conversations you interpret. One boundary catches new interpreters off guard: you cannot give legal advice. A defendant may turn to you as the only person in the room who speaks their language and ask what they should do. The answer is always to direct them to their attorney.