The Top 10 Interpretation Languages in Demand in the US

The most commonly spoken languages in the United States are not necessarily the languages with the largest need for interpreting services.

For organizations planning language access, the more useful measure is the number of people who speak a language at home and report speaking English less than “very well.” These limited English proficient (LEP) populations can differ significantly by language and location, which means national speaker counts alone do not tell you which languages your organization is most likely to need.

Using the latest U.S. Census data, we ranked 10 of the largest language groups by their LEP populations and looked at where those needs are concentrated across the country. The list can serve as a starting point for interpreting coverage, but local demographics and your own request data should ultimately guide which languages you prioritize.

Here are 10 of the top languages to consider when planning interpreting services in the United States.

1. Spanish interpreter services

44.9 million home speakers, 18.4 million LEP, +4.7% year over year.

Spanish is not simply first on this list; it is larger than the other nine languages combined by roughly a factor of three. It accounts for about 64% of all limited English proficient (LEP) speakers in the United States. For organizations planning language access nationally, Spanish is the baseline against which other language needs are often measured.

Geography also does relatively little to narrow the need. Spanish is the most commonly spoken non-English language across nearly every state, and Spanish-speaking LEP populations are present throughout the country. Organizations serving multiple regions should plan for Spanish access across locations, service lines, and operating hours rather than treating it as a regional need.

Learn more about Boostlingo Spanish interpreting services.

2. Mandarin and Cantonese interpreter services

3.7 million home speakers, 1.9 million LEP, +4.1% year over year.

The Census groups Mandarin, Cantonese, and other Chinese varieties into a single “Chinese” category, which can obscure an important consideration for language access: Mandarin and Cantonese are not interchangeable. A Mandarin-only interpreter should not be assigned to someone who prefers Cantonese, and speakers of Taishanese, Hokkien, Fuzhounese, and other Chinese varieties may have different language needs.

Chinese has one of the highest LEP rates on this list at about 51%, meaning roughly half of Chinese speakers in the United States report speaking English less than very well. Chinese-speaking populations are also concentrated in particular metropolitan areas, so state-level totals can hide substantial differences between local communities.

Learn more about Boostlingo Mandarin interpreting services.

Learn more about Boostlingo Cantonese interpreting services.

3. Vietnamese interpreter services

1.6 million home speakers, 918,210 LEP, +2.1% year over year.

Vietnamese has the highest LEP rate among the major languages on this list at about 57%. The majority of Vietnamese speakers in the country report speaking English less than very well. That means Vietnamese represents a much larger potential language-access need than its total speaker population alone might suggest.

Vietnamese-speaking populations are particularly concentrated in several major metropolitan areas, including parts of California and Texas. Organizations should use local demographic and request data alongside national figures when determining how much Vietnamese interpreting capacity they need.

Learn more about Boostlingo Vietnamese interpreting services.

4. Tagalog interpreter services

1.9 million home speakers, 584,724 LEP, +7.5% year over year.

Tagalog is the third most commonly spoken non-English language in the United States. Its LEP rate is relatively low among the languages on this list, at about 30%, but 584,724 speakers still report speaking English less than very well. That population grew 7.5% year over year, the second-fastest increase among the ten languages listed here.

Tagalog-speaking populations are also unevenly distributed across the country. States such as California, Hawaii, and Nevada have substantially different language-access needs than states with much smaller Filipino populations. National totals are useful for context, but local data should guide staffing and interpreter availability.

See Tagalog availability through Boostlingo.

5. Korean interpreter services

1.2 million home speakers, 565,989 LEP, +1.6% year over year.

Korean has a high LEP rate of about 49% relative to its total speaker population. Among the ten languages on this list, it has the fifth-largest population of people who report speaking English less than very well.

Korean-speaking populations are concentrated in major metropolitan areas including Los Angeles, New York, Northern New Jersey, Atlanta, Seattle, and Dallas–Fort Worth. For organizations operating in those areas, national or statewide averages may understate the importance of Korean language access within particular communities.

Learn more about Boostlingo Korean interpreting services.

6. Arabic interpreter services

1.5 million home speakers, 513,293 LEP, +6.1% year over year.

Arabic remains one of the faster-growing languages on this list, with the number of LEP speakers increasing 6.1% year over year and 11.5% since 2021.

California has the largest Arabic-speaking population overall, with 223,882 home speakers, ahead of Michigan at 190,833. Michigan narrowly leads in LEP speakers specifically, with 82,929 compared with California’s 79,868. That makes both states major centers of Arabic language need, with New York also home to a substantial Arabic-speaking population.

“Arabic” also covers multiple spoken varieties. Modern Standard Arabic is primarily used in formal writing, education, and media, while everyday speech generally uses regional varieties such as Egyptian, Levantine, Iraqi, Gulf, Sudanese, Yemeni, and Maghrebi Arabic. When possible, an Arabic interpreter request should capture the speaker’s preferred variety or country of origin to help with interpreter matching.

Learn more about Boostlingo Arabic interpreting services.

7. Haitian Creole interpreter services

1.0 million home speakers, 454,970 LEP, +12.1% year over year.

Haitian Creole posted the fastest year-over-year LEP growth of any language on this list at +12.1%, and the LEP population is up 32.1% since 2021.

Recent migration from Haiti has contributed to the growth of Haitian communities in the United States. Humanitarian programs, including the CHNV parole process, allowed substantial numbers of Haitians to enter the country in recent years. Changes to immigration programs and legal status can also affect where language access is needed, including healthcare, legal services, housing, government programs, and social services.

Haitian Creole is especially important in South Florida, where the Haitian population is heavily concentrated. It is also a distinct language from French, not a dialect of it. A French interpreter should not automatically be treated as a substitute for a Haitian Creole interpreter. Language preference should be confirmed directly with the person receiving services.

Learn more about Boostlingo Haitian Creole interpreting services.

8. Russian interpreter services

1.0 million home speakers, 429,378 LEP, −1.6% year over year.

The estimated number of Russian LEP speakers declined slightly year over year and remains close to its 2021 level. Given the margins of error in ACS estimates, the broader takeaway is that the population has remained relatively stable.

The Russian-speaking population in the United States also extends beyond immigrants from Russia. Russian is spoken across parts of Ukraine, Belarus, Kazakhstan, Uzbekistan, Moldova, the Baltic states, and other countries that were once part of the Soviet Union.

That does not mean Russian should be assigned based on country of origin. For example, some Ukrainian speakers also speak Russian, while others prefer Ukrainian. Language preference should be confirmed directly rather than inferred from nationality or geography.

Learn more about Boostlingo Russian interpreting services.

9. Portuguese interpreter services

1.1 million home speakers, 394,010 LEP, −0.4% year over year.

The estimated Portuguese LEP population was essentially flat year over year, while the total number of Portuguese speakers increased 17.3% between 2021 and 2024.

Portuguese-speaking populations are concentrated differently from many of the other large language groups on this list. Southeastern New England has longstanding Portuguese, Azorean, Cape Verdean, and Brazilian communities, while Florida is also home to a substantial Portuguese-speaking population. As a result, Portuguese may represent a much larger language-access need in particular states and metropolitan areas than its national ranking suggests.

Brazilian and European Portuguese differ in vocabulary, pronunciation, and usage. When relevant to the interaction, organizations should identify the speaker’s preferred variety when requesting a Portuguese interpreter.

Learn more about Boostlingo Portuguese interpreting services.

10. French interpreter services

1.3 million home speakers, 279,230 LEP, +10.9% year over year.

French has the lowest LEP rate on this list at about 22%, which is why its LEP population ranks below languages with fewer total speakers. Many French speakers in the United States are fully proficient in English, including longstanding Franco-American and Cajun communities.

At the same time, French-speaking immigration to the United States includes people from West and Central African countries such as the Democratic Republic of the Congo, Cameroon, Guinea, Senegal, Côte d’Ivoire, and Mali. Some speakers may also prefer another language used in their home country, including Swahili, Lingala, Wolof, Fula, or Bambara.

That makes it important to ask for a person’s preferred language rather than assuming French based on nationality or country of origin.

Learn more about Boostlingo French interpreting services.

How These Languages Were Ranked

Counting the total number of people who speak a language at home tells you about culture and community. It does not tell you how much interpreting you will be asked to provide.

The industry-standard basis for sizing interpretation demand is the limited-English-proficient (LEP) population: people age 5 and over who speak a language other than English at home and report speaking English less than “very well.” That is the group that needs a qualified interpreter to participate meaningfully in a medical, legal, educational, or government encounter, and it is the definition federal agencies have used for language-access planning for two decades.

The gap between the two measures is large enough to change the ranking. Tagalog has more home speakers than Arabic, Haitian Creole, Russian, Portuguese, or French, but its LEP rate is the lowest of the ten languages below, at about 30%. Vietnamese has fewer than half as many home speakers as Tagalog, but the highest LEP rate on the list at roughly 57%, meaning a Vietnamese-speaking community of a given size generates substantially more interpretation requests than a Tagalog-speaking community of the same size.

Visit our LEP State Map to see the full breakdown of LEP speakers by state in the US.

Supporting the Top Languages for Interpreting

These ten languages represent some of the largest language-access needs in the United States, but no national ranking can tell an organization exactly what it needs to support. The right mix depends on where you operate, who you serve, and which languages people in your community actually prefer to use.

Start with LEP population data, then compare it with your own interpreter request history and local demographics. Pay attention to regional concentrations, language varieties, and changes in the communities you serve. A language that ranks ninth nationally may be one of your most important locally.

Boostlingo helps organizations provide on-demand and scheduled interpreting across hundreds of languages, so they can build coverage around the people they actually serve. Speak to our team to learn more about how Boostlingo can support you in providing interpreting in the languages you need.