diff --git a/cypress/support/commands.js b/cypress/support/commands.js
index 4d3d6fad629..ba4edd9f598 100644
--- a/cypress/support/commands.js
+++ b/cypress/support/commands.js
@@ -64,7 +64,7 @@ Cypress.Commands.add('createSubmissionWithApi', (data, csrfToken) => {
 			if (typeof data.files === 'undefined' || !data.files.length) {
 				return;
 			}
-			cy.visit('/index.php/publicknowledge/submission?id=' + submissionId);
+			cy.visit('/index.php/publicknowledge/en/submission?id=' + submissionId);
 			cy.get('button:contains("Continue")').click();
 
 			// Must use the UI to upload files until we upgrade Cypress
diff --git a/cypress/tests/data/60-content/CallanSubmission.cy.js b/cypress/tests/data/60-content/CallanSubmission.cy.js
index 4a622983359..3a3c3bdcb12 100644
--- a/cypress/tests/data/60-content/CallanSubmission.cy.js
+++ b/cypress/tests/data/60-content/CallanSubmission.cy.js
@@ -190,7 +190,7 @@ describe('Data suite tests', function() {
 		cy.contains('Bomb Canada and Other Unkind Remarks in the American Media').should('not.exist');
 		cy.logout();
 		cy.request({
-				url: 'index.php/publicknowledge/catalog/book/' + submission.id,
+				url: 'index.php/publicknowledge/en/catalog/book/' + submission.id,
 				failOnStatusCode: false
 			})
 			.then((response) => {
diff --git a/cypress/tests/integration/Doi.cy.js b/cypress/tests/integration/Doi.cy.js
index e5d7378dc7f..24d35904c4f 100644
--- a/cypress/tests/integration/Doi.cy.js
+++ b/cypress/tests/integration/Doi.cy.js
@@ -51,7 +51,7 @@ describe('DOI tests', function() {
 
 		cy.log('Check Submission Visibility');
 		// Select a monograph
-		cy.visit(`/index.php/publicknowledge/catalog/book/${submissionId}`);
+		cy.visit(`/index.php/publicknowledge/en/catalog/book/${submissionId}`);
 
 		// Monograph DOI
 		cy.get('div.item.doi')
diff --git a/cypress/tests/integration/Payments.cy.js b/cypress/tests/integration/Payments.cy.js
index 65374d0822c..c6ec7fecb0e 100644
--- a/cypress/tests/integration/Payments.cy.js
+++ b/cypress/tests/integration/Payments.cy.js
@@ -49,7 +49,7 @@ describe('Payments', function() {
 
     it('Visit Submission page and check Direct Sales', function () {
         cy.login('gfavio');
-        cy.visit('index.php/publicknowledge/catalog');
+        cy.visit('index.php/publicknowledge/en/catalog');
         cy.get('a').contains('Bomb Canada and Other Unkind Remarks in the American Media').click();
         cy.get('a.cmp_download_link').contains('9.99 Purchase PDF (9.99 USD)').should('be.visible').click();
         cy.get('p').contains('You could send a message to us.').should('be.visible');
diff --git a/cypress/tests/integration/Z_MonographViewDCMetadata.cy.js b/cypress/tests/integration/Z_MonographViewDCMetadata.cy.js
index 9f40f31bd65..b5db33eb8a1 100644
--- a/cypress/tests/integration/Z_MonographViewDCMetadata.cy.js
+++ b/cypress/tests/integration/Z_MonographViewDCMetadata.cy.js
@@ -410,7 +410,7 @@ describe('Monograph View Metadata - DC Plugin', function() {
 				return cy.submitSubmissionWithApi(submission.id, this.csrfToken);
 			})
 			.then(xhr => {
-				cy.visit('/index.php/publicknowledge/workflow/index/' + submission.id + '/1');
+				cy.visit('/index.php/publicknowledge/en/workflow/index/' + submission.id + '/1');
 			});
 
 
@@ -522,7 +522,7 @@ describe('Monograph View Metadata - DC Plugin', function() {
 	});
 
 	it('Tests if Header DC Metadata are present and consistent', function() {
-		cy.visit('/index.php/publicknowledge/catalog/book/' + submission.urlPath);
+		cy.visit('/index.php/publicknowledge/en/catalog/book/' + submission.urlPath);
 
 		cy.get('meta[name^="DC."]').each((item, index, list) => {
 			cy.wrap(item)
diff --git a/cypress/tests/integration/plugins/reports/MonographReport.cy.js b/cypress/tests/integration/plugins/reports/MonographReport.cy.js
index 680f7b6d735..77edeefd87b 100644
--- a/cypress/tests/integration/plugins/reports/MonographReport.cy.js
+++ b/cypress/tests/integration/plugins/reports/MonographReport.cy.js
@@ -22,7 +22,7 @@ describe('Monograph report plugin tests', () => {
 			const {itemsMax: submissionCount, items: [firstMonograph]} = submissionResponse.body;
 			const publication = firstMonograph.publications.pop();
 			expect(reportResponse.headers['content-type']).to.contain('text/comma-separated-values');
-			expect(reportResponse.body.match(/\/publicknowledge\/workflow\/access\/\d+/g).length).to.equal(submissionCount);
+			expect(reportResponse.body.match(/\/publicknowledge\/en\/workflow\/access\/\d+/g).length).to.equal(submissionCount);
 			expect(reportResponse.body).contains(publication.title.en);
 			for (const author of publication.chapters.flatMap(chapter => Object.values(chapter.authors))) {
 				expect(reportResponse.body).contains(author.givenName.en);
diff --git a/lib/pkp b/lib/pkp
index 54e54ca0f73..101a0978d3c 160000
--- a/lib/pkp
+++ b/lib/pkp
@@ -1 +1 @@
-Subproject commit 54e54ca0f730ee02b35a47835738ba00b4d2e2c9
+Subproject commit 101a0978d3ccef52855916017d95bbaf75eef018
diff --git a/pages/user/index.php b/pages/user/index.php
index 27ea8d34d5b..66d0284d9ec 100644
--- a/pages/user/index.php
+++ b/pages/user/index.php
@@ -22,7 +22,6 @@
     // Misc.
     //
     case 'index':
-    case 'setLocale':
     case 'authorizationDenied':
     case 'getInterests':
     case 'toggleHelp':
diff --git a/plugins/blocks/languageToggle/LanguageToggleBlockPlugin.php b/plugins/blocks/languageToggle/LanguageToggleBlockPlugin.php
index 844f1f66a5d..bc90fe0759b 100644
--- a/plugins/blocks/languageToggle/LanguageToggleBlockPlugin.php
+++ b/plugins/blocks/languageToggle/LanguageToggleBlockPlugin.php
@@ -87,10 +87,8 @@ public function getContents($templateMgr, $request = null)
             }
         }
 
-        if (isset($locales) && count($locales) > 1) {
-            $templateMgr->assign('enableLanguageToggle', true);
-            $templateMgr->assign('languageToggleLocales', $locales);
-        }
+        $templateMgr->assign('enableLanguageToggle', $locales && count($locales) > 1);
+        $templateMgr->assign('languageToggleLocales', $locales);
 
         return parent::getContents($templateMgr);
     }
diff --git a/plugins/blocks/languageToggle/templates/block.tpl b/plugins/blocks/languageToggle/templates/block.tpl
index 4597ee9c1ce..44b357c5d6d 100644
--- a/plugins/blocks/languageToggle/templates/block.tpl
+++ b/plugins/blocks/languageToggle/templates/block.tpl
@@ -21,7 +21,7 @@
 		<ul>
 			{foreach from=$languageToggleLocales item=localeName key=localeKey}
 				<li class="locale_{$localeKey|escape}{if $localeKey == $currentLocale} current{/if}" lang="{$localeKey|replace:"_":"-"}">
-					<a href="{url router=PKPApplication::ROUTE_PAGE page="user" op="setLocale" path=$localeKey source=$smarty.server.REQUEST_URI}">
+					<a href="{url router=PKPApplication::ROUTE_PAGE page="user" op="setLocale" path=$localeKey}">
 						{$localeName}
 					</a>
 				</li>
diff --git a/plugins/generic/citationStyleLanguage b/plugins/generic/citationStyleLanguage
index 71f3c570626..b0cddf18825 160000
--- a/plugins/generic/citationStyleLanguage
+++ b/plugins/generic/citationStyleLanguage
@@ -1 +1 @@
-Subproject commit 71f3c570626be7c1b68eb11b2dc0c17adb466cc2
+Subproject commit b0cddf188254dca5337960faa7c03716b98d6499
diff --git a/plugins/generic/dublinCoreMeta/DublinCoreMetaPlugin.php b/plugins/generic/dublinCoreMeta/DublinCoreMetaPlugin.php
index 70c08253519..aff33d93594 100644
--- a/plugins/generic/dublinCoreMeta/DublinCoreMetaPlugin.php
+++ b/plugins/generic/dublinCoreMeta/DublinCoreMetaPlugin.php
@@ -133,7 +133,7 @@ public function monographView($hookName, $args)
             }
         }
 
-        $templateMgr->addHeader('dublinCoreUri', '<meta name="DC.Identifier.URI" content="' . $request->url(null, 'catalog', 'book', [$submissionBestId]) . '"/>');
+        $templateMgr->addHeader('dublinCoreUri', '<meta name="DC.Identifier.URI" content="' . $request->getDispatcher()->url($request, Application::ROUTE_PAGE, null, 'catalog', 'book', [$submissionBestId], urlLocaleForPage: '') . '"/>');
 
         $templateMgr->addHeader('dublinCoreLanguage', '<meta name="DC.Language" scheme="ISO639-1" content="' . substr($publicationLocale, 0, 2) . '"/>');
 
@@ -145,7 +145,7 @@ public function monographView($hookName, $args)
         }
 
         $templateMgr->addHeader('dublinCoreSource', '<meta name="DC.Source" content="' . htmlspecialchars($press->getName($press->getPrimaryLocale())) . '"/>');
-        $templateMgr->addHeader('dublinCoreSourceUri', '<meta name="DC.Source.URI" content="' . $request->url($press->getPath()) . '"/>');
+        $templateMgr->addHeader('dublinCoreSourceUri', '<meta name="DC.Source.URI" content="' . $request->getDispatcher()->url($request, Application::ROUTE_PAGE, $press->getPath(), urlLocaleForPage: '') . '"/>');
 
         if ($subjects = $publication->getData('subjects')) {
             foreach ($subjects as $locale => $localeSubjects) {
@@ -276,7 +276,7 @@ public function monographFileView($hookName, $args)
             }
         }
 
-        $templateMgr->addHeader('dublinCoreUri', '<meta name="DC.Identifier.URI" content="' . $request->url(null, 'catalog', 'book', [$submissionBestId, $publicationFormat->getId(), $submissionFile->getId()]) . '"/>');
+        $templateMgr->addHeader('dublinCoreUri', '<meta name="DC.Identifier.URI" content="' . $request->getDispatcher()->url($request, Application::ROUTE_PAGE, null, 'catalog', 'book', [$submissionBestId, $publicationFormat->getId(), $submissionFile->getId()], urlLocaleForPage: '') . '"/>');
 
         $templateMgr->addHeader('dublinCoreLanguage', '<meta name="DC.Language" scheme="ISO639-1" content="' . substr($publicationLocale, 0, 2) . '"/>');
 
@@ -292,7 +292,7 @@ public function monographFileView($hookName, $args)
             $templateMgr->addHeader('dublinCoreIssn', '<meta name="DC.Source.ISSN" content="' . htmlspecialchars($issn) . '"/>');
         }
 
-        $templateMgr->addHeader('dublinCoreSourceUri', '<meta name="DC.Source.URI" content="' . $request->url($press->getPath()) . '"/>');
+        $templateMgr->addHeader('dublinCoreSourceUri', '<meta name="DC.Source.URI" content="' . $request->getDispatcher()->url($request, Application::ROUTE_PAGE, $press->getPath(), urlLocaleForPage: '') . '"/>');
 
         if ($subjects = $publication->getData('subjects')) {
             foreach ($subjects as $locale => $localeSubjects) {
diff --git a/plugins/generic/googleScholar/GoogleScholarPlugin.php b/plugins/generic/googleScholar/GoogleScholarPlugin.php
index adf75b2e983..483efaf7172 100644
--- a/plugins/generic/googleScholar/GoogleScholarPlugin.php
+++ b/plugins/generic/googleScholar/GoogleScholarPlugin.php
@@ -14,6 +14,7 @@
 
 namespace APP\plugins\generic\googleScholar;
 
+use APP\core\Application;
 use APP\template\TemplateManager;
 use PKP\citation\CitationDAO;
 use PKP\db\DAORegistry;
@@ -211,10 +212,10 @@ private function _setFileUrl($availableFile, TemplateManager $templateMgr, int $
     {
         switch ($availableFile->getData('mimetype')) {
             case 'application/pdf':
-                $templateMgr->addHeader('googleScholarPdfUrl' . $i++, '<meta name="citation_pdf_url" content="' . $request->url(null, 'catalog', 'download', [$submission->getId(), $availableFile->getData('assocId'), $availableFile->getId()]) . '"/>');
+                $templateMgr->addHeader('googleScholarPdfUrl' . $i++, '<meta name="citation_pdf_url" content="' . $request->getDispatcher()->url($request, Application::ROUTE_PAGE, null, 'catalog', 'download', [$submission->getId(), $availableFile->getData('assocId'), $availableFile->getId()], urlLocaleForPage: '') . '"/>');
                 break;
             case 'text/xml' or 'text/html':
-                $templateMgr->addHeader('googleScholarHtmlUrl' . $i++, '<meta name="citation_fulltext_html_url" content="' . $request->url(null, 'catalog', 'download', [$submission->getId(), $availableFile->getData('assocId'), $availableFile->getId()]) . '"/>');
+                $templateMgr->addHeader('googleScholarHtmlUrl' . $i++, '<meta name="citation_fulltext_html_url" content="' . $request->getDispatcher()->url($request, Application::ROUTE_PAGE, null, 'catalog', 'download', [$submission->getId(), $availableFile->getData('assocId'), $availableFile->getId()], urlLocaleForPage: '') . '"/>');
                 break;
         }
     }
diff --git a/plugins/importexport/onix30/filter/MonographONIX30XmlFilter.php b/plugins/importexport/onix30/filter/MonographONIX30XmlFilter.php
index 3cd687f567b..587e1338ebb 100644
--- a/plugins/importexport/onix30/filter/MonographONIX30XmlFilter.php
+++ b/plugins/importexport/onix30/filter/MonographONIX30XmlFilter.php
@@ -158,7 +158,7 @@ public function createProductNode($doc, $submission, $publicationFormat)
         $productNode = $doc->createElementNS($deployment->getNamespace(), 'Product');
 
         $request = Application::get()->getRequest();
-        $productNode->appendChild($this->_buildTextNode($doc, 'RecordReference', $request->url($context->getPath(), 'monograph', 'view', [$submission->getId()])));
+        $productNode->appendChild($this->_buildTextNode($doc, 'RecordReference', $request->getDispatcher()->url($request, Application::ROUTE_PAGE, $context->getPath(), 'monograph', 'view', [$submission->getId()], urlLocaleForPage: '')));
         $productNode->appendChild($this->_buildTextNode($doc, 'NotificationType', '03'));
         $productNode->appendChild($this->_buildTextNode($doc, 'RecordSourceType', '04')); // Bibliographic agency
 
@@ -492,7 +492,7 @@ public function createProductNode($doc, $submission, $publicationFormat)
         $publisherNode->appendChild($websiteNode);
 
         $websiteNode->appendChild($this->_buildTextNode($doc, 'WebsiteRole', '18')); // 18 -> Publisher's B2C website
-        $websiteNode->appendChild($this->_buildTextNode($doc, 'WebsiteLink', $request->url($context->getPath())));
+        $websiteNode->appendChild($this->_buildTextNode($doc, 'WebsiteLink', $request->getDispatcher()->url($request, Application::ROUTE_PAGE, $context->getPath(), urlLocaleForPage: '')));
 
         /* --- Publishing Dates --- */
 
@@ -672,7 +672,7 @@ public function createProductNode($doc, $submission, $publicationFormat)
                 $supplierNode->appendChild($supplierWebsiteNode);
 
                 $supplierWebsiteNode->appendChild($this->_buildTextNode($doc, 'WebsiteRole', '18')); // 18 -> Public website
-                $supplierWebsiteNode->appendChild($this->_buildTextNode($doc, 'WebsiteLink', $request->url($context->getPath())));
+                $supplierWebsiteNode->appendChild($this->_buildTextNode($doc, 'WebsiteLink', $request->getDispatcher()->url($request, Application::ROUTE_PAGE, $context->getPath(), urlLocaleForPage: '')));
 
                 unset($supplierNode);
                 unset($supplierWebsiteNode);
diff --git a/plugins/metadata/dc11/filter/Dc11SchemaPublicationFormatAdapter.php b/plugins/metadata/dc11/filter/Dc11SchemaPublicationFormatAdapter.php
index 63c7de56e16..fa5fca43284 100755
--- a/plugins/metadata/dc11/filter/Dc11SchemaPublicationFormatAdapter.php
+++ b/plugins/metadata/dc11/filter/Dc11SchemaPublicationFormatAdapter.php
@@ -156,7 +156,7 @@ public function extractMetadataFromDataObject(&$publicationFormat)
         // Identifier: URL
         $request = Application::get()->getRequest();
         if ($monograph instanceof Submission) {
-            $dc11Description->addStatement('dc:identifier', $request->url($press->getPath(), 'catalog', 'book', [$publication->getData('urlPath') ?? $monograph->getId()]));
+            $dc11Description->addStatement('dc:identifier', $request->getDispatcher()->url($request, Application::ROUTE_PAGE, $press->getPath(), 'catalog', 'book', [$publication->getData('urlPath') ?? $monograph->getId()], urlLocaleForPage: ''));
         }
 
         // Public identifiers (e.g. DOI, URN)
@@ -214,7 +214,7 @@ public function extractMetadataFromDataObject(&$publicationFormat)
         foreach ($pubFormatFiles as $file) {
             {
                 if ($file->getData('assocId') == $publicationFormat->getData('id')) {
-                    $relation = $request->url($press->getData('urlPath'), 'catalog', 'view', [$publication->getData('urlPath') ?? $monograph->getId(), $publicationFormat->getId(), $file->getId()]);
+                    $relation = $request->getDispatcher()->url($request, Application::ROUTE_PAGE, $press->getData('urlPath'), 'catalog', 'view', [$publication->getData('urlPath') ?? $monograph->getId(), $publicationFormat->getId(), $file->getId()], urlLocaleForPage: '');
                     $dc11Description->addStatement('dc:relation', $relation);
                 }
             }