diff --git a/src/main/resources/messages_en_GB.properties b/src/main/resources/messages_en_GB.properties
index 3ba5f64fc..4d66707ed 100644
--- a/src/main/resources/messages_en_GB.properties
+++ b/src/main/resources/messages_en_GB.properties
@@ -11,7 +11,8 @@ multiPdfDropPrompt=Select (or drag & drop) all PDFs you require
 imgPrompt=Select Image(s)
 genericSubmit=Submit
 uploadLimit=Maximum file size:
-uploadLimitExceeded=is too large. Maximum allowed size is
+uploadLimitExceededSingular=is too large. Maximum allowed size is
+uploadLimitExceededPlural=are too large. Maximum allowed size is
 processTimeWarning=Warning: This process can take up to a minute depending on file-size
 pageOrderPrompt=Custom Page Order (Enter a comma-separated list of page numbers or Functions like 2n+1) :
 pageSelectionPrompt=Custom Page Selection (Enter a comma-separated list of page numbers 1,5,6 or Functions like 2n+1) :
diff --git a/src/main/resources/messages_en_US.properties b/src/main/resources/messages_en_US.properties
index a310a54f9..b86372f8d 100644
--- a/src/main/resources/messages_en_US.properties
+++ b/src/main/resources/messages_en_US.properties
@@ -11,7 +11,8 @@ multiPdfDropPrompt=Select (or drag & drop) all PDFs you require
 imgPrompt=Select Image(s)
 genericSubmit=Submit
 uploadLimit=Maximum file size:
-uploadLimitExceeded=is too large. Maximum allowed size is
+uploadLimitExceededSingular=is too large. Maximum allowed size is
+uploadLimitExceededPlural=are too large. Maximum allowed size is
 processTimeWarning=Warning: This process can take up to a minute depending on file-size
 pageOrderPrompt=Custom Page Order (Enter a comma-separated list of page numbers or Functions like 2n+1) :
 pageSelectionPrompt=Custom Page Selection (Enter a comma-separated list of page numbers 1,5,6 or Functions like 2n+1) :
diff --git a/src/main/resources/messages_pt_PT.properties b/src/main/resources/messages_pt_PT.properties
index 50e61e0e4..2f8e78ebc 100644
--- a/src/main/resources/messages_pt_PT.properties
+++ b/src/main/resources/messages_pt_PT.properties
@@ -11,7 +11,8 @@ multiPdfDropPrompt=Selecione (ou arraste e solte) todos os PDFs necessários
 imgPrompt=Selecione Imagem(ns)
 genericSubmit=Submeter
 uploadLimit=Tamanho máximo de ficheiro:
-uploadLimitExceeded=é muito grande. O tamanho máximo permitido é
+uploadLimitExceededSingular=é muito grande. O tamanho máximo permitido é
+uploadLimitExceededPlural=estão muito grandes. O tamanho máximo permitido é
 processTimeWarning=Aviso: Este processo pode demorar até um minuto dependendo do tamanho do ficheiro
 pageOrderPrompt=Ordem Personalizada de Páginas (Insira uma lista de números de página separados por vírgulas ou Funções como 2n+1):
 pageSelectionPrompt=Seleção Personalizada de Páginas (Insira uma lista de números de página separados por vírgulas 1,5,6 ou Funções como 2n+1):
diff --git a/src/main/resources/templates/fragments/common.html b/src/main/resources/templates/fragments/common.html
index 90af57c7a..01d8f4232 100644
--- a/src/main/resources/templates/fragments/common.html
+++ b/src/main/resources/templates/fragments/common.html
@@ -208,7 +208,8 @@
         window.stirlingPDF.error = /*[[#{error}]]*/ "Error";
         window.stirlingPDF.uploadLimit = /*[[${uploadLimit}]]*/ 0;
         window.stirlingPDF.uploadLimitReadable = /*[[${uploadLimitReadable}]]*/ 'Unlimited';
-        window.stirlingPDF.uploadLimitExceeded = /*[[#{uploadLimitExceeded}]]*/ 'is too large. Maximum allowed size is';
+        window.stirlingPDF.uploadLimitExceededSingular = /*[[#{uploadLimitExceededSingular}]]*/ 'is too large. Maximum allowed size is';
+        window.stirlingPDF.uploadLimitExceededPlural = /*[[#{uploadLimitExceededPlural}]]*/ 'are too large. Maximum allowed size is';
       })();
   </script>
   <script type="module" th:src="@{'/pdfjs-legacy/pdf.mjs'}"></script>