Serving Bilingual Clients: A Practical Guide for SLPs and Audiologists

What do you do when a child on your caseload speaks a language you don't? It is a routine question, not an edge case. Most clinicians will eventually evaluate someone whose home language they speak partly or not at all, and ASHA does not issue a separate bilingual certification to solve it.

The stakes are concrete. Assess a bilingual client as if they were monolingual and you risk a false positive, an unnecessary referral, or a real disorder that goes unseen for years.

The tension is practical: standardized tests exist in few languages, qualified interpreters are unevenly available, and the ethical obligation to serve the client applies regardless.

Do SLPs Have to Be Bilingual to Serve Bilingual Clients?

No, an SLP does not have to be a bilingual speech pathologist to serve bilingual clients. But every clinician is ethically responsible for culturally and linguistically appropriate service, and ASHA sets specific expectations for anyone who delivers services in a language other than English. That gap between everyday need and a provider's self-identified language status is the real tension.

No separate certification, but real proficiency standards

ASHA prefers the term multilingual because it covers two or more languages and situations where the client's language differs from the clinician's. Audiologists, SLPs, audiology assistants, and SLPAs can all engage in multilingual service delivery. To present yourself as a multilingual service provider, you need native or near-native proficiency in the additional language, plus clinical knowledge of typical monolingual and bilingual development. That means functional competence in lexicon, semantics, phonology, morphology, syntax, and pragmatics, not just conversational ability. It also includes the skill to assess, interpret diagnostics, distinguish language difference vs disorder, treat, and make culturally responsive decisions in that language.

ASHA does not offer a separate multilingual certification. Status is self-identified, so clinicians must self-assess proficiency and clinical knowledge for each client population, language variety, service type, slp assessment tools, and cultural context. No single numerical score or universal cutoff determines readiness.

The workforce gap shapes everyday decisions

At the end of 2025, 20,854 of ASHA's 236,761 constituents self-identified as multilingual service providers, about 8.8 percent, up from 8.6 percent in 2024. That leaves many monolingual clinicians serving multilingual clients, so the practical question is not if you are bilingual, but whether you can provide an equitable assessment and treatment plan.

A practical rule when languages and skills do not match

• Treat directly when you have native or near-native proficiency and the clinical competence to assess and treat in that language for the specific disorder.
• Use a qualified interpreter or translator when you can conduct the session but cannot provide assessment or therapy in the client's language.
• Co-treat or collaborate when another clinician has the language and cultural skills, and you can contribute complementary expertise.
• Refer when the client's needs exceed what you can provide ethically, and qualified support is not available.

Interpretation and translation do not replace the clinician's responsibility for assessment, diagnosis, treatment planning, delivery, and documentation.

How to Assess a Bilingual Child for Speech Therapy

ASHA guidance is unambiguous: assess every language a child uses, not just English. A monolingual English evaluation of a bilingual child measures exposure, not ability, and can miss a real disorder or invent one that isn't there. Here is a workflow that holds up in schools and with insurers.

Start With a Detailed Language History

Before any test, build the child's language profile through a structured intake:

• Exposure and use: which languages are spoken at home versus school, and roughly how much of each day the child hears and uses each one.
• Age of onset: when the child was first exposed to each language, and whether they acquired both from birth (simultaneous) or added one later (sequential).
• Proficiency and opportunity: what the child can do in each language, plus any interrupted schooling or limited exposure that shapes current skills.

Parent-report questionnaires and teacher input round out this picture. Interview families in their home language, using a qualified interpreter when you don't share it.

Assess in Every Language, Then Combine the Picture

Gather language samples in each language the child uses and pair them with speech sound inventories in both, since a sound that is an error in one language may be expected in the other. Your goal is total communication: what the child can do across all languages, not equal skill in each.

Use bilingual SLP resources and tools that fit bilingual reality:

• Bilingual norms where they exist, comparing the child to peers with the same language combination, age, dialect, and exposure history.¹
• Conceptual scoring, which credits a concept the child knows in either language rather than penalizing them for splitting vocabulary across two.
• Converging evidence when no valid norms exist: dynamic assessment, both-language samples, caregiver and teacher reports, and classroom performance.

Interpret best-language performance when identifying ability, but read both languages against exposure and opportunity. There is no universal composite or cutoff for every language pair.

Document So Eligibility Decisions Hold

School and insurance reports must state the language of testing, who administered prompts and scored responses, any interpreter involvement, and every modification made. Distinguish an accommodation (construct unchanged) from a modification (which may invalidate norms). If you altered or translated a standardized measure, label those results descriptive or nonstandard rather than presenting a score as valid. Eligibility rests on the total pattern and functional impact, not one low number, and a language difference alone does not qualify a child for school-based speech therapy eligibility.

Language Difference or Language Disorder? A Decision Framework When No Tests Exist

Start with one principle when identifying communication disorders in children: a true disorder shows up in all of a child's languages. A difference reflects exposure, dialect, or the normal path of second-language acquisition. ASHA guidance supports a multimethod, multilingual approach for this differential diagnosis, not a single English test.

Three Tools That Work Without Norms

• Dynamic assessment: Test, teach, then retest, a speech therapy technique that measures how much a child gains from brief instruction (modifiability), which tells you more than a static score. In one English/Spanish study of inferential word learning, sensitivity ranged from 90% to 100% and specificity from 90.5% to 95.2%. A 2024 review found 9 of 10 studies identified disorder, but the evidence base is small and uneven, so treat DA as a strong complement, not a stand-alone verdict.
• Language sampling with a native-speaker consultant: Collect single-word and connected-speech samples in each language, then analyze morphology, syntax, phonology, and vocabulary. A 2026 meta-analysis found pooled sensitivity of 70% and specificity of 83%, so sampling should not replace validated testing.
• Structured parent and teacher input: Ask how the child compares with peers who share the same language background, at home and at school.

A Simple If-Then Logic

• If difficulties appear in both languages, the child learns slowly during dynamic assessment, and caregivers report the same concerns across settings, disorder becomes more likely.
• If errors match typical second-language patterns or dialect features, the child responds quickly to teaching, and skills look age-appropriate in the stronger language, difference is more likely.

Interpret every result alongside exposure, proficiency, developmental history, and educational context.

When to Reserve Judgment

Mixed evidence is a reason to monitor, not to force a label. That applies when exposure to one language is very recent, when the language samples are short, or when the tools are unvalidated for that language pair. Even the Bilingual Multidimensional Ability Scale, a DA-based tool, has not had its diagnostic accuracy established (2025), so favorable results in one pairing should not be assumed to carry over to others.

Document the decision clearly: the languages assessed, the methods used, who contributed, the limits of each measure, and a dated plan to re-evaluate. A written monitoring plan protects the child from both over-identification and delayed services.

Avoiding Common Bilingual Assessment Pitfalls

Most bilingual misdiagnoses trace back to a handful of predictable mistakes, and nearly all of them can be caught before a report is signed.

Why Translated Tests Don't Work

Translating an English test into Spanish, Vietnamese, or Arabic does not produce a valid test in that language. Norms were built on the original items, and item difficulty doesn't travel with the translation. A common English word may be rare in the target language. Sounds tested early in English may develop later in another phonological system, or not exist at all. Once an item is translated, its standard score no longer means anything, so describe those results qualitatively instead.

Assumptions That Skew Results

A surname or a country of origin tells you nothing reliable about which language a child uses most, or how well. Ask the family and the child directly. Dialect matters just as much. Caribbean and Mexican Spanish differ in pronunciation and vocabulary, and African American English follows its own consistent grammatical rules. Scoring dialect features against a "standard" form inflates apparent deficits.

Code-switching and translanguaging belong in the same category, a key topic in Bilingual SLP Programs. Bilingual speakers move between languages within a conversation or even a sentence, and that reflects skill in managing two systems. Never count it as an error or cite it as evidence of confusion.

Misdiagnosis Cuts Both Ways

Over-identification happens when normal second-language learning patterns get labeled as disorder. Under-identification happens when a real disorder is dismissed because the child is "just learning English." Both delay the right support, making it critical that speech-language pathologists advocate for their patients. A true language disorder appears across every language the child speaks, so evidence from one language alone is incomplete.

A Quick Self-Audit Checklist

Before finalizing a report, confirm:

• Language history: Documented from family and school, not assumed.
• Scores: No standard scores reported from translated or non-normed tests.
• Dialect: Features judged against the child's own dialect.
• Code-switching: Described as typical behavior, not tallied as errors.
• Both languages: Skills examined in each language the child uses.
• Conclusion: Explains why the pattern points to difference or disorder.

Related Articles

Working With Interpreters and Translators in Speech-Language Pathology

Who Counts as a Qualified Interpreter

An interpreter works with spoken (or signed) language. A translator works with written text. Being bilingual doesn't automatically make someone either one, and that includes multilingual SLPs and assistants. ASHA guidance calls for competent, trained language assistance providers, ideally professional medical or educational interpreters. There is no universal national certification, so requirements depend on state law, payer rules, and district policy. Look for language proficiency, accuracy, impartiality, command of specialized vocabulary, and an understanding of ethics.

Untrained individuals and minors should not interpret. Families aren't required to interpret for their own child or relative, and children should never be put in that role.

Brief First, Then Run the Session

ASHA describes interpreter collaboration as briefing, interaction, and debriefing. Before the session, cover:

• Purpose: what you are assessing or treating and what the visit will look like.
• Terminology: clinical terms the interpreter may not have met, such as "phoneme" or "language sample."
• What not to correct: errors, dialect features, and mixed-language responses stay exactly as produced.
• Non-English responses: how you want them relayed, word for word and without cleanup.

During the session, speak to the client, not the interpreter. Use short segments so nothing gets summarized. The interpreter is not the test administrator, so standardized procedures stay yours to run. Ask the interpreter to capture exact responses, errors included, so you can analyze the language sample. The clinical decisions remain with you, and that responsibility is never transferred.

Remote Options, Documentation, and Cost

Remote interpreting can happen by videoconference, telephone, or in person. Video adds visual access, but it isn't automatically appropriate, so evaluate its quality and effectiveness. The UK's RCSLT guidance on interpreters suggests in-person interpreting for complex assessments, though that isn't a US rule. In telepractice, service quality should be equivalent to in-person care, and licensure and payer policy still apply.

In schools, language access is part of nondiscriminatory practice under Section 1557 language access guidance, and IDEA-funded programs must provide meaningful access. Districts handle costs in different ways, and no single billing code exists. Only a few state Medicaid agencies pay for interpreter services, most third-party payers don't reimburse them, and patients generally shouldn't pay out of pocket. Document language needs, since payers may ask, and verify their rules.

When No Trained Interpreter Exists

If you can't find a trained interpreter or bilingual SLP, a trained bilingual paraprofessional or cultural broker can help. Lean on non-verbal and dynamic measures rather than English-normed tests. Then state the limits plainly in your report, including who assisted, how, and what your conclusions can't support.

An Interpreter-Assisted Session: Before, During, and After

A smooth interpreter-assisted session depends on what happens before anyone enters the room and after the family leaves. Use this sequence as a quick reference for planning, running, and recording sessions with a trained interpreter.

Should Therapy Be Delivered in Both Languages?

Should therapy be delivered in both languages? The short answer is: it depends on the client's goals, the family's language use, and the service setting. But treating a child's home language as a barrier to English is not supported by evidence. The home language is a foundation, not a distraction, and a strong home language model supports English development over time.

What transfers across languages

Language-general skills such as joint attention, narrative structure, vocabulary-learning strategies, and phonological awareness can transfer between languages, so work on those skills in either language may support both. Phonology and grammar, however, often need language-specific targets. A child may need to practice the Spanish trilled /r/ and the English approximant /r/ as separate targets, not as one sound.

For speech disorders, target sounds in both languages when the sound is expected in both. Separate true errors from typical cross-language influence. For example, a Spanish-speaking child learning English may substitute /b/ for /v/ in English words; that pattern may reflect typical influence rather than a disorder, and does not automatically require treatment.

Stuttering across languages

Stuttering, like other fluency disorders, can look different in each language. A child may be more disfluent in the less familiar language, or the disfluency may be easier to hear in one language than the other. Assess and treat stuttering in both languages whenever possible, and use the same strategies across languages.

When English-only is reasonable

English-only therapy can be appropriate when English is the client's primary academic or social language and the family agrees, or when the clinician is not proficient in the home language and interpreter support is not sufficient for direct language treatment. In those cases, support the home language through family coaching: teach parents how to model rich language, expand on the child's utterances, and create communication opportunities in the home language. The goal is not to pick one language for all time but to match each language to the people and settings where the client actually uses it.

Bilingual Aphasia Treatment and Multilingual AAC for Adults

Proloquo2Go now offers more than 100 voices across English, Spanish, French, and Dutch, but its multilingual functionality remains partial in 2026. That gap reflects the larger reality of bilingual aphasia and multilingual AAC: tools are improving, yet clinical decisions still depend on the person, not the platform.

Choosing the Treatment Language in Bilingual Aphasia

There is no single correct language for bilingual aphasia treatment. Current evidence-based practice in speech-language pathology favors treating the full language repertoire rather than only the stronger language. Individualize by premorbid dominance, current use, family and work language, and functional communication goals. Dominance can shift after injury and may differ by context, so avoid assuming the pre-stroke dominant language should carry all therapy. Cross-language treatment gains can occur, but they are not guaranteed and vary by task and language history. Evidence does not reliably support treating only the stronger language or expecting automatic cross-language generalization. A functional approach may use one primary language while deliberately weaving in the other through scripts, conversation, naming, literacy, translation, code-switching, or partner practice.

Assess All Languages, Even Ones You Do Not Speak

Recovery patterns vary across languages. Some clients recover the most-used language first, others show parallel gains, and a few show greater improvement in a less dominant language. Because of this, include every language the client used premorbidly in your SLP evaluation and treatment planning. If the clinician does not speak the language, work with a trained interpreter or family member to gather structured samples, rating scales, and functional communication data. Do not interpret single-language performance as overall aphasia severity.

Multilingual AAC: More Than Word-for-Word Translation

Multilingual AAC should reflect actual communication life, not English plus literal translation. Consider home language and English when both are used, along with dialects, registers, and code-switching. Core vocabulary is language-specific; direct translation may produce unnatural or grammatically inappropriate messages. When comparing AAC apps for speech therapy, platforms vary: TouchChat with WordPower supports Canadian, UK, Australian English and Spanish, with vocabulary-based code-switching. GoTalk Now offers a bilingual button, Flexspeak AAC supports Spanish, Vietnamese, Nepali, and Mandarin with language switching and custom vocabulary, and All in One AAC lists 31 languages. But device language availability alone is not enough. Clinicians must check voice quality, editing flexibility, and whether symbols and text can be customized for each language.

Building Vocabulary With Families and Interpreters

Family and interpreter input shapes core and fringe vocabulary. Interview caregivers, the user when appropriate, extended family, cultural liaisons, and interpreters to identify essential messages, names, routines, foods, social phrases, protest or repair messages, humor, emotion, and self-advocacy. Family-centered implementation means caregivers help select vocabulary across settings, customize devices, model use, and review outcomes, rather than simply receiving instructions. Collaborative activities such as bilingual books, photos, meals, routines, outings, and storytelling generate vocabulary and aided modeling. Recent professional guidance emphasizes that monolingual clinicians can still collaborate with caregivers and cultural liaisons to create culturally relevant low, light, or high-tech AAC.

Where the Evidence Is Still Thin

Research on multilingual AAC remains limited. There is no 2026 consensus protocol for which language to prioritize in bilingual aphasia treatment, and outcomes are highly individual. Claims about cross-language generalization should be framed cautiously. When evidence is thin, default to functional, family-informed choices and reassess frequently.

Cultural Considerations and Collaborating With Families

The field has moved away from treating cultural competence as a checklist and toward cultural responsiveness as an ongoing clinical habit, a stance that aligns with neurodiversity affirming speech therapy, and nowhere does that shift matter more than in the family interview. What a caregiver names as their child's biggest communication barrier is often not what a standardized report flags first.

Set goals around the family's actual communication life

Before writing a single target, ask what the client needs to do with language on a typical day: talk with grandparents, order food, participate in religious services, manage a classroom, keep up with siblings. If a grandmother is a primary caregiver and speaks only Tagalog, an English-only expressive goal quietly excludes the person the child talks to most. Goals written from the family's daily routines get practiced; goals written from a test protocol often don't.

Coach carryover in the language caregivers use best

Home practice works when the adult delivering it feels fluent and unselfconscious. Encourage caregivers to model, expand, and recast in their strongest language, and send home activities that don't assume English literacy: photo routines, shared storytelling, cooking and errand scripts. One of the most common concerns you will hear is that speaking two languages caused the delay. It did not, and saying so clearly, more than once, protects the home language from being dropped at exactly the moment the child needs it.

Consent, disability beliefs, and interaction norms

Informed consent is not informed if it happens in a language the family is still translating in their head. Use interpreted consent conversations, plain wording over jargon, and translated written materials when they exist. Be alert to differences that are easy to misread as noncompliance or as symptoms:

• Views on disability: some families see a diagnosis as stigmatizing, others as a gateway to services.
• Role expectations: caregivers may expect the clinician to lead entirely, or may expect to be in the room throughout.
• Interaction norms: reduced eye contact, longer turn-taking pauses, or limited child-directed questioning can be culturally typical rather than clinically significant.

Ask rather than assume, and document what the family tells you.

Finding Multilingual Materials Without Reinventing Your Toolbox

The best multilingual materials are built for the language and community you serve, not translated from English after the fact. Before you buy or download anything, know which categories matter and how to judge them.

What to Look For

• Bilingual picture stimuli: Naming and sentence-elicitation cards that work across both of a client's languages.
• Screeners: Quick tools that flag concerns in each language, used as a starting point rather than a diagnosis.
• Parent questionnaires: Language-history forms that capture input, exposure, and family concerns.
• Culturally relevant books and narratives: Stories with familiar settings, foods, and characters for language sampling and therapy.

How to Judge a Resource

Check dialect fit first. A tool built around one regional variety of Spanish or Arabic may misread a child who speaks another. Look for images of objects, homes, and activities your client actually recognizes. Ask whether normative data exist and whether they come from bilingual speakers like your client. Above all, favor materials developed in the target language, since translated items often shift in difficulty or lose meaning.

Be cautious with shortcuts. Auto-translated handouts can garble clinical terms and confuse the families you want to reach, so have a qualified translator or fluent colleague review anything you send home. Apps deserve the same scrutiny, because many have no evidence behind them.

For full lists of vetted tools by language, visit the bilingual resources page on speechpathology.org instead of building your own from scratch.

Building a Career in Multilingual Practice

ASHA and your state or school district may each define "bilingual SLP" differently, and knowing the difference saves you confusion later.

What ASHA Expects vs. State Credentials

ASHA does not offer a separate bilingual certification. Instead, it expects clinicians who provide services in a second language to show native or near-native proficiency, plus competence in that language's vocabulary, meaning, sound system, grammar, and social use. Employers often verify this with a proficiency check. State or district bilingual credentials are a different thing. Some states offer extensions, add-ons, or proficiency testing, while others give no formal recognition. Check your state's rules before assuming a credential exists.

Training Routes

• Graduate programs: Some offer bilingual or multilingual emphases, tracks, or certificates. Confirm details with each program, since no complete list exists.
• SLP clinical placements: Seek practica with multilingual caseloads and community sites.
• Language coursework: Formal study and immersion help you maintain clinical-level proficiency.

You would not be alone. In 2022, 8.3% of ASHA-certified members identified as multilingual service providers, together reporting 86 spoken languages. In 2023, close to 18% of undergraduate and over 20% of graduate CSD students were multilingual.

Outlook and Pay

Documented: BLS projects speech-language pathology employment to grow 17% from 2025 to 2035. An earlier window, 2024 to 2034, shows 15%, or about 28,200 new jobs. These are different time periods, not conflicting numbers.

Reported, not guaranteed: bilingual stipends or pay differentials of roughly $2,000 to $10,000 or more per year appear in 2026 reports. They vary by employer and setting, and some employers offer none, so ask directly during interviews.

Next Steps

Explore the SLP grad school curriculum and career pages on speechpathology.org to compare graduate options and map your path to certification.

What Speech-Language Pathologists and Related Roles Earn

The figures below are approximate national pay and employment numbers from the U.S. Bureau of Labor Statistics' 2025 Occupational Employment and Wage Statistics, and they cover all clinicians in each field, so they do not isolate bilingual SLPs or audiologists or show any pay difference for multilingual skills. These are related occupations, not the same job, so treat them as context for career planning (for example, if you are weighing audiology, a related therapy role, or eventually teaching in a university program) rather than as direct side-by-side comparisons.