Signs and the Unspoken: How to Format Sign Language (ASL) in a Script

Maya's hands move in fluid conversation. Her brother responds, his signs are sharper, faster, frustrated. Neither speaks a word, yet the dialogue is clear, loaded with subtext, and the scene is charged with conflict.

Scenes featuring Sign Language present a unique formatting challenge. You're writing dialogue that isn't spoken, visual language that exists in gesture, expression, and space. How do you convey ASL on the page? How do you indicate signing versus speech? How do you capture the rhythm and emotion of signed dialogue in screenplay format?

This guide covers standard conventions for formatting Sign Language in scripts, whether your characters use ASL, BSL, or any signed language.

Cinematic workflow frames

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Cinematic workflow still, second angle, 35mm film grain

The Fundamental Question: Spoken or Signed?

When a character uses Sign Language, the script must answer:

Is this being voiced? Some signing characters use simultaneous communication—speaking aloud while they sign. Others sign silently, without any vocalization. Still others have their signs interpreted by a separate character who voices the meaning.

Are there subtitles present? The majority of film and television productions provide subtitles for signed dialogue so hearing audiences can follow along. The script should explicitly indicate whether subtitles appear on screen.

Is the character Deaf, Hard of Hearing, or hearing? This cultural and identity context profoundly shapes how the signing is presented, perceived, and integrated into the scene.

Your formatting choices on the page communicate these realities directly to the reader, signaling accessibility, identity, and the mechanics of how the dialogue reaches different audiences.

Standard Format: Signed Dialogue with Subtitles

The most common screenwriting approach mirrors the treatment of foreign language dialogue: write the signed content in English, then note in action or parenthetical that it's being signed and that subtitles appear for the audience.

Example:

MAYA (signing, subtitled) "I told you I'd handle it. Why can't you trust me?"

DAVID (signing, subtitled) "Because you said the same thing last time."

Notes:

"(signing, subtitled)" indicates the delivery method.
Write the dialogue in English, this is what the subtitles will display.
Quotation marks around the signed text are optional; some writers use them to distinguish from spoken dialogue.

This format is clear and readable.

A Table: Sign Language Formatting Options

Scenario	Format Example	When to Use
Signed only, subtitled	(signing, subtitled)	Deaf characters signing to each other
Signed with voiceover	(signing; V.O. translates)	When an interpreter or voice is added
Signed while speaking	(signing while speaking)	Characters using simultaneous communication
Signed, no subtitles	(signing; we don't understand)	Point-of-view of hearing character who doesn't sign

Option: Signed While Speaking

Some characters sign and speak simultaneously. This is called "SimCom" (simultaneous communication) or "sign-supported speech."

Example:

JENNIFER (signing while speaking) I need you to listen carefully.

TOMMY (signing while speaking) I'm listening. But you're not saying anything new.

Notes:

The parenthetical indicates both modes.
Write the dialogue once, it's both spoken and signed.

Option: Voiceover Translation

When a hearing character interprets for a Deaf character, or when voiceover is added in post-production:

Example:

ELENA (signing)

CARLOS interprets:

CARLOS She says the contract was never signed, that she doesn't owe anyone anything—there's no legal obligation on her side.

Or, if voiceover is added without an on-screen interpreter:

ELENA (signing; translated via voice-over narration) "The contract was never signed. I don't owe anyone anything."

Option: Signed Dialogue, No Translation

Sometimes the audience isn't meant to understand the signing directly; instead, we experience it from a hearing character's point of view, sharing their limited perspective.

Example:

Maya and David argue in rapid Sign Language. Their hands fly back and forth, it's clearly heated and confrontational. Sarah watches from the side, unable to follow the exchange.

SARAH What are they saying?

INTERPRETER You don't want to know.

Here, the signed dialogue isn't scripted in detail because we're not meant to understand the specific words being said. The action description conveys the emotional content and intensity instead.

A script page showing ASL exchange between Deaf characters with subtitle notes; dark mode technical sketch, thin white lines on black background

Conveying Emotion and Rhythm

Sign Language isn't just hand movements, it's facial expression, body posture, rhythm. Great Sign Language dialogue is performative.

In your script, you can convey this:

Example:

MAYA (signing, subtitled; her face says everything) "You promised."

Her hands are slow, deliberate. Each sign lands like an accusation.

DAVID (signing, subtitled; defensive, faster) "Things changed. I did what I had to do."

Action description around the dialogue indicates pacing and emotion. This guides the actor and director.

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The "Trench Warfare" Section: What Goes Wrong

Failure Mode #1: Writing Sign Language as Inferior

The script treats signing as a limitation or obstacle to be overcome, something to pity or work around. The signing characters are defined primarily or solely by their Deafness, rather than by their personality, goals, relationships, or other dimensions of identity.

How to Fix It: Write Deaf characters as fully realized people with complex inner lives, motivations, and agency. Their signing is simply their mode of communication, not a disability or tragic condition. Consult with Deaf creatives, actors, or professional ASL consultants during development to ensure authentic representation.

Failure Mode #2: Forgetting Subtitles

The script includes signed dialogue but doesn't indicate whether subtitles will appear on screen. The reader is left to assume the audience won't understand the signing, creating confusion about accessibility and narrative intent.

How to Fix It: Use the notation "(signing, subtitled)" consistently throughout the script whenever a character uses sign language. Make clear and explicit what the audience will see on screen and how they will access the meaning of signed exchanges.

Failure Mode #3: Inconsistent Formatting

Signed dialogue is formatted inconsistently: sometimes it appears in parentheticals, sometimes in action lines, sometimes in italics or other formatting. The reader can't track the underlying logic or pattern, making the script harder to follow and interpret correctly.

How to Fix It: Select one consistent format at the outset and apply it uniformly across every scene and character action in the script.

Failure Mode #4: Inauthentic ASL Representation

The writer mistakenly assumes ASL is simply "English rendered through hand gestures." In reality, ASL possesses its own distinct grammar rules, unique idiomatic expressions, and structural patterns that differ fundamentally from spoken English.

How to Fix It: Collaborate directly with an ASL consultant or cultural advisor. They can provide guidance on dialogue construction and ensure that translations into sign language feel natural, culturally appropriate, and authentic to Deaf communication norms.

Failure Mode #5: Over-Describing the Signs

"She makes the sign for 'love', hand over heart, then the sign for 'you', pointing finger."

How to Fix It: Avoid scripting or choreographing individual signs in detail. Instead, write the dialogue content itself and trust the performer to render it in ASL. If a particular sign carries visual or narrative significance, include a brief action note to flag it without dictating exact hand shapes or movements.

Indicating Specific Signs (When Necessary)

Occasionally, a particular sign has visual significance:

Example:

MAYA (signing, subtitled) "I love you."

She forms the ILY handshape—thumb, index finger, and pinky all extended outward. David watches, then mirrors the same gesture back to her.

The ILY handshape carries immediate recognition; a concise description supplies visual detail and grounds the moment without turning it into exhaustive blocking.

Mixed Scenes: Signing and Speaking Characters

When your scene mixes characters who sign with those who speak aloud, maintaining clarity becomes critical:

Example:

MAYA (signing, subtitled) "Who is this?"

CARLOS (interpreting to Sarah) She's asking who you are.

SARAH I'm Sarah. I work with David.

CARLOS (signing to Maya)

Maya nods, skeptical.

This format lets readers follow who is signing, who is serving as interpreter, and who is delivering spoken lines.

A script excerpt with a Deaf character and hearing character interacting; dark mode technical sketch, thin white lines on black background

Case Study: CODA (2021)

The Oscar-winning film CODA weaves in substantial ASL dialogue throughout. Its script employs a reliable, repeating format:

Signed dialogue is noted with "(SIGNS, SUBTITLED)" or similar parentheticals.
The English text represents what's subtitled on screen.
Action lines describe emotional tone, speed, and physicality.
Hearing characters' spoken dialogue is standard format.

The script treats ASL as a full language, equal to English in weight and importance—not as a substitute or simplified version, but as a complete linguistic system with its own grammar, syntax, and expressive depth that carries the same narrative and emotional weight as any spoken dialogue.

Consulting and Authenticity

If you're writing significant Sign Language content:

Hire an ASL consultant. They can ensure your signed dialogue is authentic, your Deaf characters are represented respectfully, and your formatting serves the story. A consultant brings expertise in ASL linguistics, cultural nuance, and the lived experience necessary to avoid common pitfalls and elevate the authenticity of every signed exchange. A consultant brings expertise in ASL linguistics, cultural nuance, and the lived experience necessary to avoid common pitfalls and elevate the authenticity of every signed exchange.

Cast Deaf actors. This isn't just representation—Deaf actors bring native fluency that hearing actors (even trained ones) often can't match. They understand the rhythm, spatial grammar, and cultural context of ASL in ways that transform a script from accurate to alive.

Avoid "magic hearing." Don't write scenes where a Deaf character suddenly hears, reads lips perfectly, or is "cured." These tropes are harmful—they erase Deaf identity, misrepresent the Deaf experience, and perpetuate the outdated notion that deafness is a deficiency to be overcome rather than a cultural and linguistic identity to be respected.

The Perspective: Language Beyond Sound

Sign Language isn't a substitute for spoken language, it's a language unto itself, with its own poetry, humor, and power. When you write signed dialogue, you're writing for a visual performance that lives in space and time—a three-dimensional art form where meaning is constructed through handshape, movement, facial expression, and the eloquent use of the signing space itself.

The script page can only approximate this. Your job is to convey the content (what's communicated) and the intent (how it's communicated), then trust the performers to bring it to life on set with their embodied fluency.

Format clearly. Indicate subtitles. Describe emotion. And remember: silence, in Sign Language scenes, isn't absence of dialogue, it's presence of a different kind—a visual language unfolding in space.

[YOUTUBE VIDEO: An ASL consultant and screenwriter discussing how to write authentic Sign Language scenes, with examples from films that got it right and wrong.]

Further reading: