diff --git a/locales/es-MX/server.ftl b/locales/es-MX/server.ftl
index d936d8d244..c114055c3c 100644
--- a/locales/es-MX/server.ftl
+++ b/locales/es-MX/server.ftl
@@ -192,6 +192,8 @@ annotationUndoButton =
     .title = Deshacer
 annotationRedoButton =
     .title = Rehacer
+annotationTextButton =
+    .title = Agregar texto
 # Note: This button reverts all the changes on the image since the start of the editing session.
 annotationClearButton =
     .title = Limpiar
@@ -223,6 +225,21 @@ annotationColorSeaGreen =
     .title = Verde mar
 annotationColorGrey =
     .title = Gris
+# Note: annotationTextSize is a title for text size selection dropdown.
+annotationTextSize =
+    .title = Tamaño del texto
+# Values shown in text size selection dropdown
+textSizeSmall = Pequeño
+textSizeMedium = Mediano
+textSizeLarge = Grande
+# Confirm and Cancel button title shown when using text tool
+annotationTextConfirmButton =
+    .title = Confirmar
+annotationTextCancelButton =
+    .title = Cancelar
+# Default placeholder used in input field when adding text annotations
+textToolInputPlaceholder =
+    .placeholder = Hola
 
 ## Settings Page
 
diff --git a/locales/es-MX/webextension.properties b/locales/es-MX/webextension.properties
index e7ddb40221..f813dab914 100644
--- a/locales/es-MX/webextension.properties
+++ b/locales/es-MX/webextension.properties
@@ -37,7 +37,7 @@ notificationImageCopiedTitle = Captura copiada
 notificationImageCopiedDetails = Tu captura ha sido copiada al portapapeles. Presiona {meta_key}-V para pegar.
 # This is displayed as a warning when a Full Page save will be cropped.
 # {pixels} will be a number like 5000.
-imageCroppedWarning = Esta imagen ha sido recortada a {pixels}px.
+imageCropPopupWarning = La imagen guardada será recortada a {pixels}px de alto.
 # Section for error strings
 # "Out of order" is an humorous way to indicate that the service is not working
 # properly.