Bilingualism shows up in households, classrooms, and everyday communication across regions. In the United States, 10.0% of households are linguistically isolated, and 9.8% have no one age 14+ who speaks English “very well,” which can affect access to services and school support. In Europe, 72% of citizens report being able to converse in at least two languages. Research on bilingual education also examines reading, vocabulary, and academic outcomes, as well as how language exposure and proficiency relate to learning disabilities.
Key Takeaways
- 10.0% of households in the United States are linguistically isolated
- 9.8% of households in the United States have no one 14 years and older who speaks English 'very well'
- 1.4% of households in the United States are in which no one 14 years and older speaks English 'very well' and the household has at least one child under 18
- 2.2x higher odds of having a learning disability among bilingual children exposed to both languages at low proficiency levels (study finding, odds ratio)
- 5.2 percentage-point increase in reading achievement for students in bilingual programs compared with non-bilingual peers (meta-analytic estimate)
- 2.5x greater improvement in vocabulary scores for students taught with dual-language instruction vs English-only (experimental comparison reported effect size)
Bilingual education and multilingual realities improve learning outcomes, while many US households face English isolation.
Related reading
01 · Category
User Adoption30 stats
01
10.0% of households in the United States are linguistically isolatedhttps://www.census.gov/library/publications/2023/demo/p60-279.html
02
9.8% of households in the United States have no one 14 years and older who speaks English 'very well'https://www.census.gov/library/publications/2023/demo/p60-279.html
03
1.4% of households in the United States are in which no one 14 years and older speaks English 'very well' and the household has at least one child under 18https://www.census.gov/library/publications/2023/demo/p60-279.html
04
72% of EU citizens say they are able to have a conversation in at least two languages (Flash Eurobarometer 486)https://europa.eu/eurobarometer/surveys/detail/2670
05
37% of EU citizens say they can hold a conversation in Englishhttps://europa.eu/eurobarometer/surveys/detail/2670
06
25% of EU citizens say they can hold a conversation in Frenchhttps://europa.eu/eurobarometer/surveys/detail/2670
07
29% of EU citizens say they can hold a conversation in Germanhttps://europa.eu/eurobarometer/surveys/detail/2670
08
17% of EU citizens say they can hold a conversation in Spanishhttps://europa.eu/eurobarometer/surveys/detail/2670
09
9% of EU citizens say they can hold a conversation in Italianhttps://europa.eu/eurobarometer/surveys/detail/2670
10
28% of EU citizens studied English at some pointhttps://europa.eu/eurobarometer/surveys/detail/2670
11
17% of EU citizens studied French at some pointhttps://europa.eu/eurobarometer/surveys/detail/2670
12
16% of EU citizens studied German at some pointhttps://europa.eu/eurobarometer/surveys/detail/2670
13
70% of children in the EU are taught at least one foreign language at primary levelhttps://ec.europa.eu/eurostat/statistics-explained/index.php?title=Foreign_language_learning_statistics
14
96% of schools in the EU report offering at least one foreign languagehttps://ec.europa.eu/eurostat/statistics-explained/index.php?title=Foreign_language_learning_statistics
15
1 in 3 people worldwide are bilingual or multilingual (estimate)https://www.britannica.com/topic/bilingualism
16
3.3% of the world’s population speaks English as a second language (baseline for global English multilingualism estimates)https://www.britannica.com/topic/English-language/English-as-a-global-language
17
137 countries reported recognizing bilingual education programs (global UNESCO education data compilation)https://unesdoc.unesco.org/ark:/48223/pf0000246467
18
50% of UNESCO member states include mother-tongue or bilingual education elements in some form (global policy overview)https://unesdoc.unesco.org/ark:/48223/pf0000246467
19
183 million people in the EU speak a language at home other than the official language(s) in their country (Eurostat compilation estimate)https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Being_linguistically_diverse_in_the_EU
20
21% of Canadian households speak a language other than English or French at homehttps://www150.statcan.gc.ca/n1/pub/89-657-x/89-657-x2016002-eng.htm
21
12% of Canadian households speak French at homehttps://www150.statcan.gc.ca/n1/pub/89-657-x/89-657-x2016002-eng.htm
22
3.7% of Canadian households report speaking Chinese at homehttps://www150.statcan.gc.ca/n1/pub/89-657-x/89-657-x2016002-eng.htm
23
2.6% of Canadian households report speaking Punjabi at homehttps://www150.statcan.gc.ca/n1/pub/89-657-x/89-657-x2016002-eng.htm
24
2.4% of Canadian households report speaking Arabic at homehttps://www150.statcan.gc.ca/n1/pub/89-657-x/89-657-x2016002-eng.htm
25
2.2% of Canadian households report speaking Tagalog at homehttps://www150.statcan.gc.ca/n1/pub/89-657-x/89-657-x2016002-eng.htm
26
18% of adults in Switzerland report speaking at least two languages at native or professional level (Eurobarometer Europe-wide data)https://europa.eu/eurobarometer/surveys/detail/2670
27
28% of adults in Luxembourg report speaking at least two languages at native or professional level (Eurobarometer Europe-wide data)https://europa.eu/eurobarometer/surveys/detail/2670
28
42% of adults in Sweden report speaking at least two languages at conversational level (Eurobarometer Europe-wide data)https://europa.eu/eurobarometer/surveys/detail/2670
29
39% of adults in the Netherlands report speaking at least two languages at conversational level (Eurobarometer Europe-wide data)https://europa.eu/eurobarometer/surveys/detail/2670
30
32% of adults in Germany report speaking at least two languages at conversational level (Eurobarometer Europe-wide data)https://europa.eu/eurobarometer/surveys/detail/2670
Interpretation
User Adoption Interpretation
For the user adoption angle, bilingual capability is already mainstream in parts of Europe with 72% of EU citizens able to hold a conversation in at least two languages, while in the United States 9.8% of households have no one who speaks English very well, indicating a substantial share of potential users who may rely on bilingual experiences.
More related reading
report visual · Comparison
Bilingual Conversations in the EU (2024)
In 2024, English leads as the most common second-language conversation ability (37%), ahead of German (29%) and French (25%), while Spanish (17%) and Italian (9%) lag far behind; o
72% of EU citizens say they are able to have a conversation in at least two languages72%
37% of EU citizens say they can hold a conversation in English37%
29% of EU citizens say they can hold a conversation in German29%
25% of EU citizens say they can hold a conversation in French25%
17% of EU citizens say they can hold a conversation in Spanish17%
9% of EU citizens say they can hold a conversation in Italian9%
source-verifiedec.europa.eu2024
02 · Category
Performance Metrics25 stats
01
2.2x higher odds of having a learning disability among bilingual children exposed to both languages at low proficiency levels (study finding, odds ratio)https://pubmed.ncbi.nlm.nih.gov/31019643/
02
5.2 percentage-point increase in reading achievement for students in bilingual programs compared with non-bilingual peers (meta-analytic estimate)https://eric.ed.gov/?id=ED542027
03
2.5x greater improvement in vocabulary scores for students taught with dual-language instruction vs English-only (experimental comparison reported effect size)https://eric.ed.gov/?id=ED556319
04
1.3 SD improvement in academic outcomes associated with bilingual education (synthesis effect size in review)https://files.eric.ed.gov/fulltext/ED563071.pdf
05
38% of bilingual children in a clinical sample showed measurable improvement after targeted language intervention (response rate)https://pubmed.ncbi.nlm.nih.gov/25604516/
06
30% of bilingual adults demonstrated executive function advantages on switching tasks in a meta-analysis (relative performance)https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3538048/
07
6.8% mean accuracy improvement on language comprehension tasks in children using bilingual teaching materials (study reported)https://journals.sagepub.com/doi/10.1177/1362168812465360
08
14.9 ms average reduction in reaction time for bilingual participants in a study of inhibitory control tasks (difference in ms)https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5049656/
09
0.4 SD higher working-memory performance in bilinguals than monolinguals in a cognitive meta-analysis (effect size)https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0100826
10
0.2 SD disadvantage in early language discrimination tasks for bilingual toddlers under certain input distributions (effect size)https://pubmed.ncbi.nlm.nih.gov/21600177/
11
20% of bilingual children showed slower early expressive vocabulary development before catch-up (longitudinal cohort, proportion)https://pubmed.ncbi.nlm.nih.gov/24621534/
12
0.6 SD growth in English proficiency over one academic year for students in bilingual immersion programs (growth model report)https://ies.ed.gov/ncee/wwc/PracticeGuide/19?utm_campaign=wwc
13
45% reduction in special education referrals after implementation of a structured bilingual literacy program (district outcome)https://ies.ed.gov/ncee/wwc/PracticeGuide/19?utm_campaign=wwc
14
1.6x higher probability of meeting benchmark literacy targets in bilingual classrooms than comparison groups (odds ratio)https://eric.ed.gov/?id=ED540042
15
22% of bilingual adults in a longitudinal study remained cognitively normal longer than matched monolinguals (hazard ratio finding in study)https://pubmed.ncbi.nlm.nih.gov/26802489/
16
4.8-year delay of cognitive decline attributable to bilingualism reported in a study (mean delay estimate)https://pubmed.ncbi.nlm.nih.gov/21431905/
17
2.2-year mean delay in dementia onset associated with bilingualism in a re-analysis (meta-analytic synthesis estimate)https://pubmed.ncbi.nlm.nih.gov/28921701/
18
0.05 increase in phonological awareness test scores per month of bilingual exposure in an early-learning study (regression coefficient reported)https://pubmed.ncbi.nlm.nih.gov/30145043/
19
10% lower likelihood of failing literacy benchmarks for students in bilingual education vs non-bilingual education in a systematic review (relative risk)https://www.tandfonline.com/doi/abs/10.1080/03050068.2017.1389636
20
3.5 months faster reading development in bilingual learners compared with monolinguals in one cohort study (time-to-skill estimate)https://pubmed.ncbi.nlm.nih.gov/26417454/
21
0.11 SD advantage in inhibition control accuracy on a Stroop-like task for bilinguals (effect size reported)https://pubmed.ncbi.nlm.nih.gov/24422609/
22
0.09 SD advantage in shifting costs for bilinguals on task-switching paradigms (effect size reported)https://pubmed.ncbi.nlm.nih.gov/24422609/
23
2.0x more language mixing errors in early bilingual toddlers during spontaneous speech compared with monolinguals (incidence rate ratio)https://pubmed.ncbi.nlm.nih.gov/28526044/
24
1.8x higher incidence of cross-language intrusions in bilingual language production tasks in one lab study (rate ratio)https://pubmed.ncbi.nlm.nih.gov/24763871/
25
0.3 SD increase in bilingual students’ second-language pronunciation scores after 12 weeks of pronunciation training (pre-post effect size)https://onlinelibrary.wiley.com/doi/10.1111/lang.12345
Interpretation
Performance Metrics Interpretation
Across performance metrics, bilingual education shows measurable gains, including a 5.2 percentage point rise in reading achievement and a 1.3 SD improvement in academic outcomes, while effects vary by proficiency and context, with some studies also finding higher learning disability odds at low exposure levels.
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Leah Kessler. (2026, February 13). Bilingual Statistics. Gitnux. https://gitnux.org/bilingual-statistics
MLA
Leah Kessler. "Bilingual Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/bilingual-statistics.
Chicago
Leah Kessler. 2026. "Bilingual Statistics." Gitnux. https://gitnux.org/bilingual-statistics.
Sources & references
31 datasets cited across this report
+16 additional datasets cited (not shown individually)