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 05fa44a2d0..652ae2f129 100644
--- a/src/Umbraco.Web.UI.Client/src/assets/lang/en.ts
+++ b/src/Umbraco.Web.UI.Client/src/assets/lang/en.ts
@@ -2555,16 +2555,21 @@ export default {
 	},
 	welcomeDashboard: {
 		umbracoForumHeadline: 'The Umbraco community forum',
-		umbracoForumDescription: 'The forum is the central hub for the Umbraco developer community. This is where developers, integrators, and contributors come together to ask questions, share knowledge, and collaborate on all things Umbraco.',
+		umbracoForumDescription:
+			'The forum is the central hub for the Umbraco developer community. This is where developers, integrators, and contributors come together to ask questions, share knowledge, and collaborate on all things Umbraco.',
 		umbracoForumButton: 'Visit the Umbraco community forum',
 		umbracoCommunityHeadline: 'The Umbraco community site',
-		umbracoCommunityDescription: 'The gathering place for all things Umbraco. Whether you write, teach, test, give feedback, or want to connect with others, there’s a way for you to be part of the Friendly Umbraco community.',
+		umbracoCommunityDescription:
+			'The gathering place for all things Umbraco. Whether you write, teach, test, give feedback, or want to connect with others, there’s a way for you to be part of the Friendly Umbraco community.',
 		documentationHeadline: 'Documentation',
-		documentationDescription: 'Your guide to everything Umbraco. Learn how to get started, explore new features, and discover best practices through clear examples and explanations.',
+		documentationDescription:
+			'Your guide to everything Umbraco. Learn how to get started, explore new features, and discover best practices through clear examples and explanations.',
 		resourcesHeadline: 'Resources',
-		resourcesDescription: 'Explore Umbraco resources to learn, build, and grow your skills. Find blogs, tutorials, demos, documentation, and videos to help you make the most of Umbraco.',
+		resourcesDescription:
+			'Explore Umbraco resources to learn, build, and grow your skills. Find blogs, tutorials, demos, documentation, and videos to help you make the most of Umbraco.',
 		trainingHeadline: 'Training',
-		trainingDescription: 'Master Umbraco with official training. Get practical experience through instructor-led courses and earn certifications that help you grow your skills and career.',
+		trainingDescription:
+			'Master Umbraco with official training. Get practical experience through instructor-led courses and earn certifications that help you grow your skills and career.',
 	},
 	blockEditor: {
 		headlineCreateBlock: 'Pick Element Type',
@@ -2877,29 +2882,52 @@ 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 4eb741360a..dddedeb197 100644
--- a/src/Umbraco.Web.UI.Client/src/assets/lang/vi.ts
+++ b/src/Umbraco.Web.UI.Client/src/assets/lang/vi.ts
@@ -2819,34 +2819,4 @@ 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'),
 	},
 ];