diff --git a/src/Umbraco.Web.UI.Client/src/assets/lang/en.ts b/src/Umbraco.Web.UI.Client/src/assets/lang/en.ts
index f57a8dbea3..aa6e5766b6 100644
--- a/src/Umbraco.Web.UI.Client/src/assets/lang/en.ts
+++ b/src/Umbraco.Web.UI.Client/src/assets/lang/en.ts
@@ -2869,29 +2869,52 @@ export default {
 		ar: 'العربية',
 		bs: 'Bosanski',
 		cs: 'Česky',
+		'cs-cz': 'Česky (Czechia)',
 		cy: 'Cymraeg',
+		'cy-gb': 'Cymraeg (UK)',
 		da: 'Dansk',
+		'da-dk': 'Dansk (Danmark)',
 		de: 'Deutsch',
+		'de-de': 'Deutsch (Deutschland)',
+		'de-ch': 'Deutsch (Schweiz)',
 		en: 'English (UK)',
 		'en-us': 'English (US)',
 		es: 'Español',
+		'es-es': 'Español (España)',
 		fr: 'Français',
-		he: 'Hebrew',
+		'fr-fr': 'Français (France)',
+		'fr-ch': 'Français (Suisse)',
+		he: 'עברית',
+		'he-il': 'עברית (ישראל)',
 		hr: 'Hrvatski',
+		'hr-hr': 'Hrvatski (Hrvatska)',
 		it: 'Italiano',
+		'it-it': 'Italiano (Italia)',
+		'it-ch': 'Italiano (Svizzera)',
 		ja: '日本語',
+		'ja-jp': '日本語 (日本)',
 		ko: '한국어',
+		'ko-kr': '한국어 (한국)',
 		nb: 'Norsk Bokmål',
+		'nb-no': 'Norsk (Bokmål)',
 		nl: 'Nederlands',
+		'nl-nl': 'Nederlands (Nederland)',
 		pl: 'Polski',
+		'pl-pl': 'Polski (Polska)',
 		pt: 'Português',
 		'pt-br': 'Português (Brasil)',
-		ro: 'Romana',
+		ro: 'Română',
+		'ro-ro': 'Română (România)',
 		ru: 'Русский',
+		'ru-ru': 'Русский (Россия)',
 		sv: 'Svenska',
+		'sv-se': 'Svenska (Sverige)',
 		tr: 'Türkçe',
+		'tr-tr': 'Türkçe (Türkiye Cumhuriyeti)',
 		uk: 'Українська',
+		'uk-ua': 'Українська (Україна)',
 		zh: '中文',
+		'zh-cn': '中文（简体，中国）',
 		'zh-tw': '中文（正體，台灣）',
 		vi: 'Tiếng Việt',
 	},
diff --git a/src/Umbraco.Web.UI.Client/src/assets/lang/vi.ts b/src/Umbraco.Web.UI.Client/src/assets/lang/vi.ts
index 65be353739..ae763698a4 100644
--- a/src/Umbraco.Web.UI.Client/src/assets/lang/vi.ts
+++ b/src/Umbraco.Web.UI.Client/src/assets/lang/vi.ts
@@ -2836,34 +2836,4 @@ export default {
 		resetUrlMessage: 'Bạn có chắc chắn muốn đặt lại URL này không?',
 		resetUrlLabel: 'Đặt lại',
 	},
-	uiCulture: {
-		ar: 'العربية',
-		bs: 'Bosanski',
-		cs: 'Česky',
-		cy: 'Cymraeg',
-		da: 'Dansk',
-		de: 'Deutsch',
-		en: 'English (UK)',
-		'en-us': 'English (US)',
-		es: 'Español',
-		fr: 'Français',
-		he: 'Hebrew',
-		hr: 'Hrvatski',
-		it: 'Italiano',
-		ja: '日本語',
-		ko: '한국어',
-		nb: 'Norsk Bokmål',
-		nl: 'Nederlands',
-		pl: 'Polski',
-		pt: 'Português',
-		'pt-br': 'Português (Brasil)',
-		ro: 'Romana',
-		ru: 'Русский',
-		sv: 'Svenska',
-		tr: 'Türkçe',
-		uk: 'Українська',
-		zh: '中文',
-		'zh-tw': '中文（正體，台灣）',
-		vi: 'Tiếng Việt',
-	},
 } as UmbLocalizationDictionary;
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/localization/manifests.ts b/src/Umbraco.Web.UI.Client/src/packages/core/localization/manifests.ts
index 17760f4434..f429831c7c 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/localization/manifests.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/localization/manifests.ts
@@ -4,281 +4,335 @@ export const manifests: Array<ManifestLocalization> = [
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.AR',
-		weight: 100,
 		name: 'Arabic Backoffice UI Localization',
-		meta: {
-			culture: 'ar',
-		},
+		meta: { culture: 'ar' },
 		js: () => import('../../../assets/lang/ar.js'),
 	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.BS',
-		weight: 100,
 		name: 'Bosnian Backoffice UI Localization',
-		meta: {
-			culture: 'bs',
-		},
+		meta: { culture: 'bs' },
 		js: () => import('../../../assets/lang/bs.js'),
 	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.CS',
-		weight: 100,
 		name: 'Czech Backoffice UI Localization',
-		meta: {
-			culture: 'cs',
-		},
+		meta: { culture: 'cs' },
 		js: () => import('../../../assets/lang/cs.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.CS_CZ',
+		name: 'Czech (Czechia) Backoffice UI Localization',
+		meta: { culture: 'cs-CZ' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.CY',
-		weight: 100,
 		name: 'Welsh Backoffice UI Localization',
-		meta: {
-			culture: 'cy',
-		},
+		meta: { culture: 'cy' },
 		js: () => import('../../../assets/lang/cy.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.CY_GB',
+		name: 'Welsh (UK) Backoffice UI Localization',
+		meta: { culture: 'cy-GB' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.DA',
-		weight: 100,
 		name: 'Danish Backoffice UI Localization',
-		meta: {
-			culture: 'da',
-		},
+		meta: { culture: 'da' },
 		js: () => import('../../../assets/lang/da.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.DA-DK',
+		name: 'Danish (Denmark) Backoffice UI Localization',
+		meta: { culture: 'da-DK' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.DE',
-		weight: 100,
 		name: 'German Backoffice UI Localization',
-		meta: {
-			culture: 'de',
-		},
+		meta: { culture: 'de' },
 		js: () => import('../../../assets/lang/de.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.DE_DE',
+		name: 'German (Germany) Backoffice UI Localization',
+		meta: { culture: 'de-DE' },
+	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.DE_CH',
+		name: 'German (Switzerland) Backoffice UI Localization',
+		meta: { culture: 'de-CH' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.EN',
-		weight: 100,
 		name: 'English (United Kingdom) Backoffice UI Localization',
-		meta: {
-			culture: 'en',
-		},
+		meta: { culture: 'en' },
 		js: () => import('../../../assets/lang/en.js'),
 	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.EN_US',
-		weight: 100,
 		name: 'English (United States) Backoffice UI Localization',
-		meta: {
-			culture: 'en-US',
-		},
+		meta: { culture: 'en-US' },
 		js: () => import('../../../assets/lang/en-us.js'),
 	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.ES',
-		weight: 100,
 		name: 'Spanish Backoffice UI Localization',
-		meta: {
-			culture: 'es',
-		},
+		meta: { culture: 'es' },
 		js: () => import('../../../assets/lang/es.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.ES_ES',
+		name: 'Spanish (Spain) Backoffice UI Localization',
+		meta: { culture: 'es-ES' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.FR',
-		weight: 100,
 		name: 'French Backoffice UI Localization',
-		meta: {
-			culture: 'fr',
-		},
+		meta: { culture: 'fr' },
 		js: () => import('../../../assets/lang/fr.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.FR_FR',
+		name: 'French (France) Backoffice UI Localization',
+		meta: { culture: 'fr-FR' },
+	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.FR_CH',
+		name: 'French (Switzerland) Backoffice UI Localization',
+		meta: { culture: 'fr-CH' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.HE',
-		weight: 100,
 		name: 'Hebrew Backoffice UI Localization',
-		meta: {
-			culture: 'he',
-		},
+		meta: { culture: 'he' },
 		js: () => import('../../../assets/lang/he.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.HE_IL',
+		name: 'Hebrew (Israel) Backoffice UI Localization',
+		meta: { culture: 'he-IL' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.HR',
-		weight: 100,
 		name: 'Croatian Backoffice UI Localization',
-		meta: {
-			culture: 'hr',
-		},
+		meta: { culture: 'hr' },
 		js: () => import('../../../assets/lang/hr.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.HR_HR',
+		name: 'Croatian (Croatia) Backoffice UI Localization',
+		meta: { culture: 'hr-HR' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.IT',
-		weight: 100,
 		name: 'Italian Backoffice UI Localization',
-		meta: {
-			culture: 'it',
-		},
+		meta: { culture: 'it' },
 		js: () => import('../../../assets/lang/it.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.IT_IT',
+		name: 'Italian (Italy) Backoffice UI Localization',
+		meta: { culture: 'it-IT' },
+	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.IT_CH',
+		name: 'Italian (Switzerland) Backoffice UI Localization',
+		meta: { culture: 'it-CH' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.JA',
-		weight: 100,
 		name: 'Japanese Backoffice UI Localization',
-		meta: {
-			culture: 'ja',
-		},
+		meta: { culture: 'ja' },
 		js: () => import('../../../assets/lang/ja.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.JA_JP',
+		name: 'Japanese (Japan) Backoffice UI Localization',
+		meta: { culture: 'ja-JP' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.KO',
-		weight: 100,
 		name: 'Korean Backoffice UI Localization',
-		meta: {
-			culture: 'ko',
-		},
+		meta: { culture: 'ko' },
 		js: () => import('../../../assets/lang/ko.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.KO_KR',
+		name: 'Korean (Korea) Backoffice UI Localization',
+		meta: { culture: 'ko-KR' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.NB',
-		weight: 100,
 		name: 'Norwegian Backoffice UI Localization',
-		meta: {
-			culture: 'nb',
-		},
+		meta: { culture: 'nb' },
 		js: () => import('../../../assets/lang/nb.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.NB_NO',
+		name: 'Norwegian (Norway) Backoffice UI Localization',
+		meta: { culture: 'nb-NO' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.NL',
-		weight: 100,
 		name: 'Dutch Backoffice UI Localization',
-		meta: {
-			culture: 'nl',
-		},
+		meta: { culture: 'nl' },
 		js: () => import('../../../assets/lang/nl.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.NL_NL',
+		name: 'Dutch (Netherlands) Backoffice UI Localization',
+		meta: { culture: 'nl-NL' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.PL',
-		weight: 100,
 		name: 'Polish Backoffice UI Localization',
-		meta: {
-			culture: 'pl',
-		},
+		meta: { culture: 'pl' },
 		js: () => import('../../../assets/lang/pl.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.PL_PL',
+		name: 'Polish (Poland) Backoffice UI Localization',
+		meta: { culture: 'pl-PL' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.PT',
-		weight: 100,
 		name: 'Portuguese Backoffice UI Localization',
-		meta: {
-			culture: 'pt',
-		},
+		meta: { culture: 'pt' },
 		js: () => import('../../../assets/lang/pt.js'),
 	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.PT_BR',
-		weight: 100,
 		name: 'Portuguese (Brazil) Backoffice UI Localization',
-		meta: {
-			culture: 'pt-BR',
-		},
+		meta: { culture: 'pt-BR' },
 		js: () => import('../../../assets/lang/pt-br.js'),
 	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.RO',
-		weight: 100,
 		name: 'Romanian Backoffice UI Localization',
-		meta: {
-			culture: 'ro',
-		},
+		meta: { culture: 'ro' },
 		js: () => import('../../../assets/lang/ro.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.RO_RO',
+		name: 'Romanian (Romania) Backoffice UI Localization',
+		meta: { culture: 'ro-RO' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.RU',
-		weight: 100,
 		name: 'Russian Backoffice UI Localization',
-		meta: {
-			culture: 'ru',
-		},
+		meta: { culture: 'ru' },
 		js: () => import('../../../assets/lang/ru.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.RU_RU',
+		name: 'Russian (Russia) Backoffice UI Localization',
+		meta: { culture: 'ru-RU' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.SV',
-		weight: 100,
 		name: 'Swedish Backoffice UI Localization',
-		meta: {
-			culture: 'sv',
-		},
+		meta: { culture: 'sv' },
 		js: () => import('../../../assets/lang/sv.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.SV_SE',
+		name: 'Swedish (Sweden) Backoffice UI Localization',
+		meta: { culture: 'sv-SE' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.TR',
-		weight: 100,
 		name: 'Turkish Backoffice UI Localization',
-		meta: {
-			culture: 'tr',
-		},
+		meta: { culture: 'tr' },
 		js: () => import('../../../assets/lang/tr.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.TR_TR',
+		name: 'Turkish (Türkiye) Backoffice UI Localization',
+		meta: { culture: 'tr-TR' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.UK',
-		weight: 100,
 		name: 'Ukrainian Backoffice UI Localization',
-		meta: {
-			culture: 'uk',
-		},
+		meta: { culture: 'uk' },
 		js: () => import('../../../assets/lang/uk.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.UK_UA',
+		name: 'Ukrainian (Ukraine) Backoffice UI Localization',
+		meta: { culture: 'uk-UA' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.ZH',
-		weight: 100,
 		name: 'Chinese Backoffice UI Localization',
-		meta: {
-			culture: 'zh',
-		},
+		meta: { culture: 'zh' },
 		js: () => import('../../../assets/lang/zh.js'),
 	},
+	{
+		type: 'localization',
+		alias: 'Umb.Localization.ZH_CN',
+		name: 'Chinese (Simplified, China) Backoffice UI Localization',
+		meta: { culture: 'zh-CN' },
+	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.ZH_TW',
-		weight: 100,
 		name: 'Chinese (Taiwan) Backoffice UI Localization',
-		meta: {
-			culture: 'zh-TW',
-		},
+		meta: { culture: 'zh-TW' },
 		js: () => import('../../../assets/lang/zh-tw.js'),
 	},
 	{
 		type: 'localization',
 		alias: 'Umb.Localization.VI',
-		weight: 100,
 		name: 'Vietnamese Backoffice UI Localization',
-		meta: {
-			culture: 'vi',
-		},
+		meta: { culture: 'vi' },
 		js: () => import('../../../assets/lang/vi.js'),
 	},
 ];