diff --git a/src/main/resources/messages_en_GB.properties b/src/main/resources/messages_en_GB.properties
index dc9cc218996..b8c443216cc 100644
--- a/src/main/resources/messages_en_GB.properties
+++ b/src/main/resources/messages_en_GB.properties
@@ -73,7 +73,7 @@ joinDiscord=Join our Discord server
 seeDockerHub=See Docker Hub
 visitGithub=Visit Github Repository
 donate=Donate
-color=Color
+color=Colour
 sponsor=Sponsor
 info=Info
 pro=Pro
@@ -419,9 +419,9 @@ home.auto-rename.title=Auto Rename PDF File
 home.auto-rename.desc=Auto renames a PDF file based on its detected header
 auto-rename.tags=auto-detect,header-based,organize,relabel
 
-home.adjust-contrast.title=Adjust Colors/Contrast
+home.adjust-contrast.title=Adjust Colours/Contrast
 home.adjust-contrast.desc=Adjust Contrast, Saturation and Brightness of a PDF
-adjust-contrast.tags=color-correction,tune,modify,enhance
+adjust-contrast.tags=color-correction,tune,modify,enhance,colour-correction
 
 home.crop.title=Crop PDF
 home.crop.desc=Crop a PDF to reduce its size (maintains text!)
@@ -488,11 +488,11 @@ overlay-pdfs.tags=Overlay
 
 home.split-by-sections.title=Split PDF by Sections
 home.split-by-sections.desc=Divide each page of a PDF into smaller horizontal and vertical sections
-split-by-sections.tags=Section Split, Divide, Customize
+split-by-sections.tags=Section Split, Divide, Customize,Customise
 
 home.AddStampRequest.title=Add Stamp to PDF
 home.AddStampRequest.desc=Add text or add image stamps at set locations
-AddStampRequest.tags=Stamp, Add image, center image, Watermark, PDF, Embed, Customize
+AddStampRequest.tags=Stamp, Add image, center image, Watermark, PDF, Embed, Customize,Customise
 
 
 home.PDFToBook.title=PDF to Book
@@ -518,21 +518,21 @@ validateSignature.tags=signature,verify,validate,pdf,certificate,digital signatu
 
 #replace-invert-color
 replace-color.title=Advanced Colour options
-replace-color.header=Replace-Invert Color PDF
+replace-color.header=Replace-Invert Colour PDF
 home.replaceColorPdf.title=Advanced Colour options
-home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
-replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
-replace-color.selectText.1=Replace or Invert color Options
-replace-color.selectText.2=Default(Default high contrast colors)
-replace-color.selectText.3=Custom(Customized colors)
-replace-color.selectText.4=Full-Invert(Invert all colors)
-replace-color.selectText.5=High contrast color options
+home.replaceColorPdf.desc=Replace colour for text and background in PDF and invert full colour of pdf to reduce file size
+replaceColorPdf.tags=Replace Colour,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert colour Options
+replace-color.selectText.2=Default(Default high contrast colours)
+replace-color.selectText.3=Custom(Customised colours)
+replace-color.selectText.4=Full-Invert(Invert all colours)
+replace-color.selectText.5=High contrast colour options
 replace-color.selectText.6=white text on black background
 replace-color.selectText.7=Black text on white background
 replace-color.selectText.8=Yellow text on black background
 replace-color.selectText.9=Green text on black background
-replace-color.selectText.10=Choose text Color
-replace-color.selectText.11=Choose background Color
+replace-color.selectText.10=Choose text Colour
+replace-color.selectText.11=Choose background Colour
 replace-color.submit=Replace
 
 
@@ -655,7 +655,7 @@ AddStampRequest.position=Position
 AddStampRequest.overrideX=Override X Coordinate
 AddStampRequest.overrideY=Override Y Coordinate
 AddStampRequest.customMargin=Custom Margin
-AddStampRequest.customColor=Custom Text Color
+AddStampRequest.customColor=Custom Text Colour
 AddStampRequest.submit=Submit
 
 
@@ -787,8 +787,8 @@ removeAnnotations.submit=Remove
 #compare
 compare.title=Compare
 compare.header=Compare PDFs
-compare.highlightColor.1=Highlight Color 1:
-compare.highlightColor.2=Highlight Color 2:
+compare.highlightColor.1=Highlight Colour 1:
+compare.highlightColor.2=Highlight Colour 2:
 compare.document.1=Document 1
 compare.document.2=Document 2
 compare.submit=Compare
@@ -846,7 +846,7 @@ flatten.submit=Flatten
 ScannerImageSplit.selectText.1=Angle Threshold:
 ScannerImageSplit.selectText.2=Sets the minimum absolute angle required for the image to be rotated (default: 10).
 ScannerImageSplit.selectText.3=Tolerance:
-ScannerImageSplit.selectText.4=Determines the range of color variation around the estimated background color (default: 30).
+ScannerImageSplit.selectText.4=Determines the range of colour variation around the estimated background colour (default: 30).
 ScannerImageSplit.selectText.5=Minimum Area:
 ScannerImageSplit.selectText.6=Sets the minimum area threshold for a photo (default: 10000).
 ScannerImageSplit.selectText.7=Minimum Contour Area:
@@ -898,7 +898,7 @@ compress.title=Compress
 compress.header=Compress PDF
 compress.credit=This service uses qpdf for PDF Compress/Optimisation.
 compress.selectText.1=Manual Mode - From 1 to 4
-compress.selectText.2=Optimization level:
+compress.selectText.2=Optimisation level:
 compress.selectText.3=4 (Terrible for text images)
 compress.selectText.4=Auto mode - Auto adjusts quality to get PDF to exact size
 compress.selectText.5=Expected PDF Size (e.g. 25MB, 10.8MB, 25KB)