Skip to contentClinically validated by researchers at Johns Hopkins Medicine
All states

Medical interpreters in California

Real-time medical interpretation for healthcare teams in California, on phones, tablets, and computers.

16.3 million residentsspeak another language at home.

Source: U.S. Census Bureau, 2017-2021 American Community Survey 5-year estimates.

Major metro areas in California
Metro areaSpeak a language other than EnglishLimited-English residents
Los Angeles-Long Beach-Anaheim6,573,7722,761,869
Riverside-San Bernardino-Ontario1,998,173707,808
San Francisco-Oakland-Fremont1,920,320749,781
San Diego-Chula Vista-Carlsbad1,221,222434,788
Sacramento-Roseville-Folsom727,750288,041
San Jose-Sunnyvale-Santa Clara1,048,628398,447
Fresno502,395205,950
Bakersfield-Delano388,601146,857
Oxnard-Thousand Oaks-Ventura304,435118,250
Stockton-Lodi346,017139,306
Modesto222,40983,325
Santa Rosa-Petaluma124,85452,930
Visalia222,70198,035
Vallejo134,50751,764
Santa Maria-Santa Barbara168,86868,232
Salinas230,425102,673
Merced142,08757,169
San Luis Obispo-Paso Robles47,14314,839
Santa Cruz-Watsonville85,03330,682

Dots mark major metro areas (U.S. Census Bureau, 2024 ACS 1-year or 2020-2024 ACS 5-year estimates). Faded surrounding shapes are neighboring states.

44%

of California residents speak a language other than English at home.

6.4 million

California residents speak English less than “very well”: the federal threshold for needing language assistance.

#1

highest limited-English share for California among the 50 states and DC.

Source: U.S. Census Bureau, 2017-2021 American Community Survey 5-year estimates.

Meet Opalite.

Real-time AI medical interpretation in 150+ languages and dialects, connecting providers and patients in seconds.

  • Works on the devices care teams already carry: phones, tablets, computers, and telehealth platforms
  • Integrates with all EHRs
  • Built for HIPAA-compliant healthcare
  • SOC 2 Type II attested security controls

FAQs about medical interpretation in California

Statewide, about 1 in 6 residents speaks English less than “very well”: 17% of California, compared with 8.2% across the U.S. 81% of all U.S. Armenian speakers live here as well.

Source: U.S. Census Bureau, 2017-2021 American Community Survey 5-year estimates.

Opalite recorded over 90% fewer errors than certified medical interpreters in its blinded validation study. The study compared Spanish, Mandarin, and Cantonese clinical dialogue and also reported over 98% fewer major and critical errors. Opalite uses the same underlying interpretation techniques across its supported languages, bringing that approach to local providers.

Try Opalite with your care team.

See a live interpretation demo for patients across California. Ask about setup and pricing.