Multiple main languages in the household by council, Census 2021

Households of each of England's and Wales's 318 councils by multiple main languages in the household, Census 2021, from the ONS Census API (its “Multiple main languages in household (6 categories)”).

One-person household, highest: Birmingham

133,224

Census Day, 21 March 2021

Verified against source, 30 October 2026, 11:48 UTC

Multiple main languages in the household by council, Census 2021

Source: Office for National Statistics (Census 2021). Contains public sector information licensed under the Open Government Licence v3.0.

Data table

318 rows

Area	One-person household	All household members have the same main language	Main language differs between generations, but not within partnerships	Main language differs within partnerships	Any other combination of multiple main languages
Birmingham E08000025	133,224	233,999	19,722	18,275	18,236
Leeds E08000035	111,380	210,728	6,609	7,035	5,714
North Yorkshire E06000065	84,891	185,122	1,157	2,252	959
County Durham E06000047	79,529	152,555	666	1,312	697
Cornwall E06000052	76,862	169,829	716	2,038	1,091
Liverpool E08000012	76,340	121,591	3,448	3,271	2,841
Somerset E06000066	76,028	168,135	1,661	2,740	1,556
Sheffield E08000019 its area before 1 April 2025	75,759	143,362	4,418	4,792	3,619
Manchester E08000003	71,577	117,070	9,371	8,134	8,581
Bradford E08000032	64,596	121,716	7,064	9,403	7,088
Wiltshire E06000054	60,574	149,210	1,474	2,578	1,247
Buckinghamshire E06000060	57,889	149,101	3,824	5,617	3,897
Bristol, City of E06000023	57,862	119,647	3,667	5,254	5,208
Bournemouth, Christchurch and Poole E06000058	56,531	107,925	2,397	4,091	2,898
Kirklees E08000034	55,176	111,194	3,442	4,895	3,282
Cheshire East E06000049	53,136	117,573	1,125	1,995	1,027
Dorset E06000059	51,741	114,828	619	1,450	623
Wirral E08000015	49,688	91,227	701	1,212	424
Northumberland E06000057	48,149	97,475	320	733	245
Cardiff W06000015	47,463	91,023	2,955	3,136	2,756
Cheshire West and Chester E06000050	46,887	104,633	960	1,852	822
West Northamptonshire E06000062	46,474	115,755	3,361	3,620	3,428
Wakefield E08000036	46,419	102,126	1,538	1,819	1,173
East Riding of Yorkshire E06000011	45,678	104,096	603	1,176	513
Wigan E08000010	43,950	96,319	918	1,256	662
Southwark E09000028	43,348	69,844	5,112	5,731	6,783
Lambeth E09000022	43,154	73,290	5,705	5,329	7,210
Croydon E09000008	43,091	91,900	6,594	5,773	5,588
Cumberland E06000063	43,019	80,855	432	816	303
Brighton and Hove E06000043	42,101	70,639	1,694	3,862	3,105
Newcastle upon Tyne E08000021	42,031	73,141	2,702	2,636	2,287
Nottingham E06000018	41,971	71,544	3,777	3,544	3,909
Dudley E08000027	41,709	90,755	1,373	1,868	1,364
Doncaster E08000017	41,667	87,707	1,511	1,541	1,053
Barnet E09000003	41,658	82,650	8,681	8,002	7,926
Sefton E08000014	41,520	79,162	769	1,087	535
Shropshire E06000051	41,428	95,822	483	1,185	661
Wandsworth E09000032	41,132	78,286	4,886	6,610	6,479
Coventry E08000026	40,777	79,585	4,988	3,951	4,839
North Northamptonshire E06000061	40,715	100,982	2,493	2,519	2,209
Westminster E09000033	40,443	38,423	4,743	5,359	5,848
Sunderland E08000024	40,368	79,828	593	818	570
Kingston upon Hull, City of E06000010	39,446	71,103	1,680	1,682	1,561
Stockport E08000007	39,439	82,962	1,355	1,890	1,002
Salford E08000006	39,141	69,132	2,003	2,472	2,369
Bromley E09000006	38,668	87,861	2,814	4,333	2,151
Tower Hamlets E09000030	38,531	53,692	9,286	8,381	10,649
Sandwell E08000028	38,042	77,452	5,515	4,449	4,787
Plymouth E06000026	37,338	73,955	1,005	1,283	977
Lewisham E09000023	37,147	70,360	4,690	5,040	5,155
Bolton E08000001	36,521	73,443	3,104	3,148	2,574
Stoke-on-Trent E06000021	36,179	68,350	2,118	2,204	1,549
Swansea W06000011	36,154	65,706	1,039	1,125	938
Camden E09000007	35,929	42,256	4,488	5,297	4,787
East Suffolk E07000244	35,819	73,220	429	883	398
Ealing E09000009	35,662	69,437	10,876	7,758	9,926
Leicester E06000016	35,173	69,732	9,334	5,994	7,155
Hackney E09000012	34,928	53,183	5,730	5,741	6,499
Islington E09000019	34,795	47,620	4,253	4,947	4,882
Westmorland and Furness E06000064	34,413	67,628	332	784	374
Rotherham E08000018	34,225	76,513	1,033	1,277	877
Greenwich E09000011	34,048	65,016	4,752	5,417	4,822
Southampton E06000045	33,711	60,002	2,673	2,986	2,919
North Tyneside E08000022	33,553	60,996	541	825	317
Barnsley E08000016 its area before 1 April 2025	33,289	72,785	699	784	496
Derby E06000015	33,054	64,066	2,778	2,876	2,877
Wolverhampton E08000031	32,468	63,172	3,683	2,962	2,856
Tameside E08000008	32,374	63,179	1,499	1,464	1,010
Haringey E09000014	32,293	53,564	6,920	5,502	6,813
Rhondda Cynon Taf W06000016	32,170	69,990	287	497	393
Walsall E08000030	32,129	72,007	2,826	2,827	2,437
Brent E09000005	31,985	59,163	10,639	6,333	10,491
Central Bedfordshire E06000056	31,171	85,398	1,126	1,972	1,088
Enfield E09000010	31,159	67,281	9,999	5,793	6,691
Gateshead E08000037	30,807	56,149	683	901	459
South Gloucestershire E06000025	30,747	83,119	1,127	1,824	1,284
Medway E06000035	30,462	75,794	1,744	1,917	1,541
Calderdale E08000033	30,308	56,742	963	1,492	971
Milton Keynes E06000042	29,795	73,596	3,588	3,415	2,708
Hammersmith and Fulham E09000013	29,324	39,574	3,467	4,526	4,353
Kensington and Chelsea E09000020	29,232	27,748	2,683	3,899	3,322
North Somerset E06000024	29,090	63,105	648	1,229	577
Trafford E08000009	28,369	62,314	1,962	2,339	1,285
Rochdale E08000005	27,641	55,663	2,410	2,651	1,859
Portsmouth E06000044	27,607	53,413	1,547	1,741	1,847
Oldham E08000004	27,396	57,033	3,000	3,084	2,626
Warrington E06000007	27,364	60,565	818	1,150	641
Swindon E06000030	27,219	62,977	1,942	2,050	1,674
Newham E09000025	27,038	56,956	11,738	7,117	12,656
Waltham Forest E09000031	26,696	58,114	5,902	5,444	6,745
York E06000014	26,640	55,966	604	1,316	933
Hillingdon E09000017	26,635	65,254	6,661	4,872	5,806
Hounslow E09000018	26,209	56,143	7,652	5,615	7,339
Havering E09000016	26,129	67,762	2,561	2,417	2,408
Southend-on-Sea E06000033	26,102	48,869	1,132	1,401	840
Stockton-on-Tees E06000004	25,980	55,893	610	749	525
Solihull E08000029	25,852	60,480	970	1,274	907
St. Helens E08000013	25,561	54,189	429	568	265
West Suffolk E07000245	25,490	50,586	801	1,204	665
Herefordshire, County of E06000019	25,434	55,290	630	947	526
Carmarthenshire W06000010	25,349	55,333	299	491	287
Norwich E07000148	25,098	35,752	994	1,314	1,301
Bury E08000002	24,880	51,985	1,198	1,540	1,092
Bexley E09000004	24,753	63,571	2,603	2,349	2,024
Blackpool E06000009	24,588	38,736	460	626	378
South Tyneside E08000023	24,550	42,597	403	503	234
Redbridge E09000026	23,886	57,420	8,556	5,719	8,132
Richmond upon Thames E09000027	23,871	49,176	2,039	3,863	1,756
Peterborough E06000031	23,516	51,079	3,438	3,119	3,381
Bath and North East Somerset E06000022	23,077	53,099	539	1,354	1,181
Colchester E07000071	23,075	53,051	987	1,473	1,123
Tendring E07000076	23,073	43,406	255	501	216
Caerphilly W06000018	22,965	52,593	192	361	146
Arun E07000224	22,768	47,491	708	988	706
New Forest E07000091	22,737	53,474	281	722	353
North East Lincolnshire E06000012	22,718	45,768	443	547	350
Isle of Wight E06000046	22,484	41,346	213	487	246
Sutton E09000029	22,197	51,345	3,637	3,082	2,085
Torbay E06000027	21,883	39,764	355	640	352
Huntingdonshire E07000011	21,564	52,605	753	1,269	688
Basildon E07000066	21,474	52,101	1,000	1,053	734
Bedford E06000055	21,448	47,361	2,097	2,266	1,778
North Lincolnshire E06000013	21,366	49,535	752	858	662
Telford and Wrekin E06000020	21,205	52,392	941	1,123	849
Chelmsford E07000070	21,153	51,464	814	1,261	713
Luton E06000032	21,068	43,484	4,954	4,560	4,874
Charnwood E07000130	20,860	49,562	1,109	1,211	1,043
Thanet E07000114	20,839	39,495	612	842	412
Redcar and Cleveland E06000003	20,663	40,508	110	248	107
Knowsley E08000011	20,645	44,375	357	464	232
Merton E09000024	20,464	48,358	4,303	4,313	4,290
Basingstoke and Deane E07000084	20,406	52,827	1,020	1,441	951
Neath Port Talbot W06000012	20,368	41,342	160	360	145
East Devon E07000040	20,056	45,622	212	605	292
Newport W06000022	19,997	43,246	900	1,063	847
Middlesbrough E06000002	19,964	37,577	889	933	899
Harrow E09000015	19,852	51,388	7,621	4,173	6,608
Powys W06000023	19,841	39,632	168	364	177
King's Lynn and West Norfolk E07000146	19,829	45,457	780	818	580
East Lindsey E07000137	19,800	44,246	177	376	155
Lancaster E07000121	19,526	38,643	464	688	659
Flintshire W06000005	19,471	46,157	361	548	374
Preston E07000123	19,400	35,801	1,482	1,595	1,330
Ipswich E07000202	19,270	36,855	1,221	1,114	1,047
Reading E06000038	19,262	40,476	2,153	2,937	2,855
Canterbury E07000106	19,046	42,131	562	1,060	993
Warwick E07000222	18,999	40,288	849	1,386	1,097
Maidstone E07000110	18,800	49,178	1,073	1,198	959
Wealden E07000065	18,745	48,200	276	744	301
Bridgend W06000013	18,664	42,928	239	331	199
Pembrokeshire W06000009	18,507	36,355	122	351	153
Cheltenham E07000078	18,432	32,231	651	1,006	579
Teignbridge E07000045	18,406	40,636	137	451	208
South Kesteven E07000141	18,226	42,962	597	704	363
West Berkshire E06000037	18,008	46,274	630	1,166	580
Conwy W06000003	17,909	33,563	196	414	153
Dacorum E07000096	17,851	42,608	916	1,243	794
Vale of Glamorgan W06000014	17,841	38,757	211	468	172
Braintree E07000067	17,774	45,724	363	745	379
Stafford E07000197	17,754	41,009	416	600	268
Kingston upon Thames E09000021	17,716	39,393	2,879	3,256	2,382
Halton E06000006	17,702	37,450	200	376	222
Gwynedd W06000002	17,664	32,602	159	391	291
Wrexham W06000006	17,662	38,846	474	544	387
Blackburn with Darwen E06000008	17,578	34,843	2,029	2,575	1,742
South Cambridgeshire E07000012	17,574	45,724	1,060	1,873	763
Horsham E07000227	17,535	43,032	364	1,020	419
Barking and Dagenham E09000002	17,503	42,404	5,845	3,418	4,732
Mid Sussex E07000228	17,421	43,661	505	1,221	541
Cherwell E07000177	17,339	44,604	1,005	1,759	1,185
Stratford-on-Avon E07000221	17,306	40,737	320	739	362
Amber Valley E07000032	17,166	38,451	169	373	116
Chesterfield E07000034	17,066	30,260	238	357	138
Exeter E07000041	17,021	32,813	615	1,111	994
South Norfolk E07000149	16,990	43,092	363	660	273
East Hertfordshire E07000242	16,952	42,818	465	1,186	601
North Hertfordshire E07000099	16,903	37,670	572	1,116	471
Chichester E07000225	16,841	35,896	289	663	430
Worthing E07000229	16,764	30,860	445	975	494
Gloucester E07000081	16,754	35,899	948	1,085	720
Windsor and Maidenhead E06000040	16,715	39,628	1,145	2,083	1,362
Darlington E06000005	16,714	31,158	356	461	229
Cambridge E07000008	16,660	27,979	1,509	3,003	3,322
Newcastle-under-Lyme E07000195	16,588	35,700	346	478	311
Breckland E07000143	16,550	41,784	703	737	585
Wyre E07000128	16,346	33,936	127	257	101
Nuneaton and Bedworth E07000219	16,345	38,009	781	864	587
North Norfolk E07000147	16,319	31,573	89	278	114
Wokingham E06000041	16,265	48,435	1,603	1,866	995
Broadland E07000144	16,238	40,584	220	512	206
Eastbourne E07000061	16,205	27,065	694	1,048	599
Thurrock E06000034	16,180	45,384	1,805	1,485	1,523
South Oxfordshire E07000179	16,105	42,996	527	1,232	637
Oxford E07000178	16,096	31,164	1,648	2,667	3,663
Ashfield E07000170	16,048	37,440	315	476	229
Havant E07000090	15,957	36,695	211	488	237
Swale E07000113	15,957	43,032	404	615	484
Wychavon E07000238	15,847	40,072	436	624	377
Reigate and Banstead E07000211	15,797	40,888	931	1,460	773
Newark and Sherwood E07000175	15,746	36,436	337	481	331
Folkestone and Hythe E07000112	15,728	31,220	418	652	320
Dover E07000108	15,658	33,609	382	584	315
Erewash E07000036	15,551	34,005	211	420	147
St Albans E07000240	15,527	39,825	957	1,920	761
Gedling E07000173	15,514	34,751	387	616	283
Bassetlaw E07000171	15,492	35,015	319	404	228
Vale of White Horse E07000180	15,437	39,439	613	1,406	603
Stroud E07000082	15,257	36,166	220	550	185
Eastleigh E07000086	15,107	40,134	489	812	382
Elmbridge E07000207	14,972	37,166	861	1,793	798
Guildford E07000209	14,840	37,568	747	1,446	1,159
Epping Forest E07000072	14,827	36,950	772	1,119	889
East Staffordshire E07000193	14,760	33,690	885	1,108	850
Chorley E07000118	14,660	34,671	211	425	168
Waverley E07000216	14,642	36,126	317	892	471
Broxtowe E07000172	14,581	32,135	426	707	512
South Ribble E07000126	14,496	33,331	199	406	153
Great Yarmouth E07000145	14,488	28,737	494	448	377
Mansfield E07000174	14,471	32,024	540	543	452
Test Valley E07000093	14,464	38,488	483	840	433
Hastings E07000062	14,441	24,542	418	669	381
Wyre Forest E07000239	14,377	30,217	189	359	178
Winchester E07000094	14,333	35,812	295	848	429
North East Derbyshire E07000038	14,305	31,236	117	247	82
Tunbridge Wells E07000116	14,198	31,990	520	1,092	423
Worcester E07000237	14,157	28,454	603	848	660
Lincoln E07000138	14,137	26,283	655	691	741
Denbighshire W06000004	14,107	27,775	143	267	95
West Lancashire E07000127	13,989	33,614	269	399	262
North Kesteven E07000139	13,989	36,187	211	448	154
Hinckley and Bosworth E07000132	13,972	34,505	261	484	224
East Hampshire E07000085	13,910	37,487	289	691	340
Ashford E07000105	13,861	37,465	772	887	598
Rushcliffe E07000176	13,822	34,654	347	761	299
Rother E07000064	13,713	27,648	144	425	172
Tonbridge and Malling E07000115	13,698	38,350	420	776	329
Hartlepool E06000001	13,616	26,795	193	209	117
Lewes E07000063	13,539	28,936	268	656	289
Bracknell Forest E06000036	13,465	33,969	828	1,239	747
North Devon E07000043	13,257	29,336	134	317	153
West Oxfordshire E07000181	13,206	33,354	289	747	385
Burnley E07000117	13,126	24,519	639	849	739
Fareham E07000087	13,009	34,689	204	517	220
Sevenoaks E07000111	12,990	34,352	406	920	344
High Peak E07000037	12,944	27,321	86	325	96
Welwyn Hatfield E07000241	12,928	29,975	920	1,099	1,286
Fylde E07000119	12,863	24,162	163	323	95
Fenland E07000010	12,787	29,436	577	661	622
Rugby E07000220	12,774	31,367	960	1,001	911
West Lindsey E07000142	12,680	29,156	151	269	89
Lichfield E07000194	12,662	32,275	169	324	200
Cannock Chase E07000192	12,573	30,347	137	259	144
South Staffordshire E07000196	12,558	33,080	106	222	155
Staffordshire Moorlands E07000198	12,536	29,496	59	198	66
North West Leicestershire E07000134	12,497	31,607	256	424	189
Torfaen W06000020	12,316	27,510	103	210	102
Monmouthshire W06000021	12,287	28,095	108	329	105
Cotswold E07000079	12,261	27,572	140	454	168
South Derbyshire E07000039	12,249	32,023	281	492	195
Mid Suffolk E07000203	11,983	31,822	109	300	129
Slough E06000039	11,948	28,631	4,473	3,464	3,907
Dartford E07000107	11,827	30,880	1,170	1,100	720
Pendle E07000122	11,824	22,891	918	1,351	1,080
Spelthorne E07000213	11,665	27,128	890	1,216	904
South Hams E07000044	11,621	27,123	99	335	156
Tewkesbury E07000083	11,551	28,431	303	449	197
Hertsmere E07000098	11,527	27,774	1,222	1,188	971
Crawley E07000226	11,517	28,820	1,674	1,647	1,844
Gosport E07000088	11,443	23,784	176	355	161
Hyndburn E07000120	11,434	21,543	496	860	458
Babergh E07000200	11,382	28,179	117	362	157
Bromsgrove E07000234	11,293	29,405	134	286	147
Gravesham E07000109	11,212	27,374	1,116	984	1,038
Watford E07000103	11,146	23,134	1,880	1,843	1,625
Woking E07000217	11,124	26,710	983	1,604	1,016
Blaby E07000129	11,095	30,082	457	525	418
Mole Valley E07000210	11,053	24,846	256	665	319
South Holland E07000140	11,051	27,582	665	748	657
Broxbourne E07000095	10,971	26,204	984	969	722
Harlow E07000073	10,918	24,434	866	891	748
Forest of Dean E07000080	10,579	26,176	95	247	119
Stevenage E07000243	10,568	23,888	709	757	589
Bolsover E07000033	10,539	24,180	142	245	156
Harborough E07000131	10,514	28,996	187	449	267
Rushmoor E07000092	10,502	26,022	988	882	909
Malvern Hills E07000235	10,303	24,050	122	296	121
East Cambridgeshire E07000009	10,291	25,639	358	664	251
Mid Devon E07000042	10,238	24,800	133	309	153
Castle Point E07000069	10,221	26,614	140	284	131
Ceredigion W06000008	10,202	20,079	106	242	266
Isle of Anglesey W06000001	10,189	20,401	48	136	48
Blaenau Gwent W06000019	10,175	19,849	89	148	78
Redditch E07000236	10,102	24,707	481	630	457
Runnymede E07000212	9,939	22,665	506	959	768
Derbyshire Dales E07000035	9,890	22,098	52	193	50
Hart E07000089	9,836	28,822	325	682	300
Rossendale E07000125	9,708	20,142	186	332	193
Tandridge E07000215	9,702	24,842	217	564	295
Three Rivers E07000102	9,697	24,941	790	841	590
Brentwood E07000068	9,402	21,902	305	484	249
Rochford E07000075	9,360	25,790	104	236	68
Torridge E07000046	9,330	20,846	55	163	62
Uttlesford E07000077	9,228	26,690	223	548	269
Surrey Heath E07000214	9,067	25,022	542	796	579
Tamworth E07000199	8,787	23,374	197	329	207
Adur E07000223	8,414	18,450	188	442	184
Merthyr Tydfil W06000024	8,258	17,100	159	164	102
Boston E07000136	8,089	18,958	876	681	800
Ribble Valley E07000124	7,807	18,641	52	177	71
North Warwickshire E07000218	7,642	19,568	75	197	100
Epsom and Ewell E07000208	7,625	21,272	800	951	673
Maldon E07000074	7,418	20,123	62	190	107
West Devon E07000047	7,300	17,214	46	188	70
Melton E07000133	6,363	15,782	148	194	112
Oadby and Wigston E07000135	6,347	14,663	540	567	500
Rutland E06000017	4,786	11,637	67	156	50
City of London E09000001	2,506	1,903	79	267	158
Isles of Scilly E06000053	307	620	0	13	2
Barnsley E08000038	given for its area before 1 April 2025, under E08000016	given for its area before 1 April 2025, under E08000016	given for its area before 1 April 2025, under E08000016	given for its area before 1 April 2025, under E08000016	given for its area before 1 April 2025, under E08000016
Sheffield E08000039	given for its area before 1 April 2025, under E08000019	given for its area before 1 April 2025, under E08000019	given for its area before 1 April 2025, under E08000019	given for its area before 1 April 2025, under E08000019	given for its area before 1 April 2025, under E08000019

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Map

One-person household · 316 areas, each shaded by the fifth of the areas its figure falls in

307 to 12k
12k to 16k
16k to 21k
21k to 34k
34k to 133k

Boundaries: Council boundaries, May 2026, from the geography spine. Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Source and licence

Publisher

Office for National Statistics (Census 2021)

Check it yourself

https://www.ons.gov.uk/datasets/create

Licence

Open Government Licence v3.0 – Contains public sector information licensed under the Open Government Licence v3.0.

Retrieved

30 October 2026, 11:42 UTC

Raw files fetched

https://api.beta.ons.gov.uk/v1/population-types/HH/census-observations?area-type=ltla23&dimensions=hh_multi_languageSHA-256 9fa8bfe99017a92f155c03ef624fd2f2531f146ea75f14698bb571db8f7b4a38 · 625,964 bytes
https://api.beta.ons.gov.uk/v1/population-types/HH/dimensions?limit=500SHA-256 1d975dc4aefd42401ab90f911470590ac63e6faea9e8fd6f81b555127037b6d3 · 27,052 bytes

Verification

Verified against source, 30 October 2026, 11:48 UTC Run at 30 October 2026, 11:48 UTC; 1590 of 1590 figures matched the live source.

Result	Check	Detail
Pass	Provenance recorded	Office for National Statistics (Census 2021); Open Government Licence v3.0; retrieved 2026-10-30T11:42:54Z; 2 raw file(s)
Pass	Raw files match recorded SHA-256	2 of 2 files intact
Pass	Re-parsing raw files reproduces figures	1590 of 1590 figures and the headline reproduced
Pass	Figures are finite numbers	1590 figures, 0 invalid
Pass	Live source matches every figure	1590 of 1590 figures match exactly after downloading 2 source file(s) again (2 byte-identical); the headline matches
Pass	The ONS's answer for England and for Wales agrees	in 10 of 10 cells (a category in a nation) the councils sum to the nation's count at https://api.beta.ons.gov.uk/v1/population-types/HH/census-observations?area-type=ctry&dimensions=hh_multi_language within twice the square root of the councils summed (2 exactly; the largest gap 0.55 of its limit), the Census's cell-by-cell perturbation
Pass	Source page answers	https://www.ons.gov.uk/datasets/create – HTTP 200

Notes

Census Day was the 21st of March 2021. The ONS perturbs every count slightly to protect privacy, each cell on its own, so a council's categories can add up to a total a few people different from one topic to another, and its councils add up to England's and Wales's counts only within a few dozen.
By council as the ONS's Census API gives them, its lower-tier local authorities of 2023, with Barnsley's and Sheffield's figures under the codes they had until the 1st of April 2025, as the API gives them. Scotland's and Northern Ireland's censuses are separate, so their councils are not here.
Every council's categories together count all its households.
The ONS's description of the topic, “Multiple main languages in household (6 categories)”: Classifies households by whether members speak the same or different main language. If multiple main languages are spoken, this identifies whether they differ between generations or partnerships within the household.