diff --git a/l10n/ar/viewer.ftl b/l10n/ar/viewer.ftl
index 06e496caa..458dbc18f 100644
--- a/l10n/ar/viewer.ftl
+++ b/l10n/ar/viewer.ftl
@@ -324,9 +324,25 @@ pdfjs-highlight-floating-button1 =
     .title = أبرِز
     .aria-label = أبرِز
 pdfjs-highlight-floating-button-label = أبرِز
+pdfjs-editor-signature-button =
+    .title = أضِف توقيع
+pdfjs-editor-signature-button-label = أضِف توقيع
 
 ## Default editor aria labels
 
+# “Highlight” is a noun, the string is used on the editor for highlights.
+pdfjs-editor-highlight-editor =
+    .aria-label = محرِّر الإبراز
+# “Drawing” is a noun, the string is used on the editor for drawings.
+pdfjs-editor-ink-editor =
+    .aria-label = محرِّر الرسم
+# Used when a signature editor is selected/hovered.
+# Variables:
+#   $description (String) - a string describing/labeling the signature.
+pdfjs-editor-signature-editor1 =
+    .aria-description = محرِّر التوقيع: { $description }
+pdfjs-editor-stamp-editor =
+    .aria-label = محرِّر الصور
 
 ## Remove button for the various kind of editor.
 
@@ -356,6 +372,16 @@ pdfjs-editor-stamp-add-image-button-label = أضِف صورة
 pdfjs-editor-free-highlight-thickness-input = السماكة
 pdfjs-editor-free-highlight-thickness-title =
     .title = غيّر السُمك عند إبراز عناصر أُخرى غير النص
+pdfjs-editor-add-signature-container =
+    .aria-label = عناصر التحكم في التوقيع والتوقيعات المحفوظة
+pdfjs-editor-signature-add-signature-button =
+    .title = أضِف توقيع جديد
+pdfjs-editor-signature-add-signature-button-label = أضِف توقيع جديد
+# Used on the button to use an already saved signature.
+# Variables:
+#   $description (String) - a string describing/labeling the signature.
+pdfjs-editor-add-saved-signature-button =
+    .title = التوقيع المحفوظ: { $description }
 # .default-content is used as a placeholder in an empty text editor.
 pdfjs-free-text2 =
     .aria-label = محرِّر النص
@@ -584,12 +610,18 @@ pdfjs-editor-add-signature-error-close-button = أغلق
 
 pdfjs-editor-add-signature-cancel-button = ألغِ
 pdfjs-editor-add-signature-add-button = أضِف
+pdfjs-editor-edit-signature-update-button = حدّث
 
 ## Main menu for adding/removing signatures
 
+pdfjs-editor-delete-signature-button1 =
+    .title = أزِل التوقيع المحفوظ
+pdfjs-editor-delete-signature-button-label1 = أزِل التوقيع المحفوظ
 
 ## Editor toolbar
 
+pdfjs-editor-add-signature-edit-button-label = عدّل الوصف
 
 ## Edit signature description dialog
 
+pdfjs-editor-edit-signature-dialog-title = عدّل الوصف
diff --git a/l10n/el/viewer.ftl b/l10n/el/viewer.ftl
index e94cdac78..b8a169dcd 100644
--- a/l10n/el/viewer.ftl
+++ b/l10n/el/viewer.ftl
@@ -270,7 +270,7 @@ pdfjs-page-landmark =
 pdfjs-loading-error = Προέκυψε σφάλμα κατά τη φόρτωση του PDF.
 pdfjs-invalid-file-error = Μη έγκυρο ή κατεστραμμένο αρχείο PDF.
 pdfjs-missing-file-error = Λείπει αρχείο PDF.
-pdfjs-unexpected-response-error = Μη αναμενόμενη απόκριση από το διακομιστή.
+pdfjs-unexpected-response-error = Απρόσμενη απάντηση διακομιστή.
 pdfjs-rendering-error = Προέκυψε σφάλμα κατά την εμφάνιση της σελίδας.
 
 ## Annotations
diff --git a/l10n/kab/viewer.ftl b/l10n/kab/viewer.ftl
index d26b87fc0..7b4b780b8 100644
--- a/l10n/kab/viewer.ftl
+++ b/l10n/kab/viewer.ftl
@@ -316,9 +316,25 @@ pdfjs-highlight-floating-button1 =
     .title = Derrer
     .aria-label = Derrer
 pdfjs-highlight-floating-button-label = Derrer
+pdfjs-editor-signature-button =
+    .title = Rnu azmul
+pdfjs-editor-signature-button-label = Rnu azmul
 
 ## Default editor aria labels
 
+# “Highlight” is a noun, the string is used on the editor for highlights.
+pdfjs-editor-highlight-editor =
+    .aria-label = Amaẓrag usebrureq
+# “Drawing” is a noun, the string is used on the editor for drawings.
+pdfjs-editor-ink-editor =
+    .aria-label = Amaẓrag n usuneɣ
+# Used when a signature editor is selected/hovered.
+# Variables:
+#   $description (String) - a string describing/labeling the signature.
+pdfjs-editor-signature-editor1 =
+    .aria-description = usuneɣ n uzmul: { $description }
+pdfjs-editor-stamp-editor =
+    .aria-label = Amaẓrag n tugna
 
 ## Remove button for the various kind of editor.
 
@@ -330,6 +346,8 @@ pdfjs-editor-remove-stamp-button =
     .title = Kkes tugna
 pdfjs-editor-remove-highlight-button =
     .title = Kkes aderrer
+pdfjs-editor-remove-signature-button =
+    .title = Kkes azmul
 
 ##
 
@@ -346,6 +364,20 @@ pdfjs-editor-stamp-add-image-button-label = Rnu tawlaft
 pdfjs-editor-free-highlight-thickness-input = Tuzert
 pdfjs-editor-free-highlight-thickness-title =
     .title = Beddel tuzert mi ara d-tesbeggneḍ iferdisen niḍen ur nelli d aḍris
+pdfjs-editor-add-signature-container =
+    .aria-label = Isenqaden n uzmul d yizmulen yettwaskelsen
+pdfjs-editor-signature-add-signature-button =
+    .title = Rnu azmul amaynut
+pdfjs-editor-signature-add-signature-button-label = Rnu azmul amaynut
+# Used on the button to use an already saved signature.
+# Variables:
+#   $description (String) - a string describing/labeling the signature.
+pdfjs-editor-add-saved-signature-button =
+    .title = Yettwasekles uzmul: { $description }
+# .default-content is used as a placeholder in an empty text editor.
+pdfjs-free-text2 =
+    .aria-label = Amaẓrag n uḍris
+    .default-content = Bdu tira…
 pdfjs-free-text =
     .aria-label = Amaẓrag n uḍris
 pdfjs-free-text-default-content = Bdu tira...
@@ -357,13 +389,24 @@ pdfjs-ink-canvas =
 ## Alt-text dialog
 
 pdfjs-editor-alt-text-button-label = Aḍris amaskal
+pdfjs-editor-alt-text-edit-button =
+    .aria-label = Ẓreg aḍris amaskal
 pdfjs-editor-alt-text-edit-button-label = Ẓreg aḍris amaskal
 pdfjs-editor-alt-text-dialog-label = Fren taxtirt
+pdfjs-editor-alt-text-dialog-description = Aḍris amaskal yettallel mi ara yili imdanen ur ttwalin ara tugna neɣ mi ara yili ur d-tuli ara.
 pdfjs-editor-alt-text-add-description-label = Rnu aglam
+pdfjs-editor-alt-text-add-description-description = Yettuwelleh tira n tefyirt neɣ n snat ideg ara d-yettwaglem asentel, akatar neɣ tigawin.
 pdfjs-editor-alt-text-mark-decorative-label = Creḍ d adlag
+pdfjs-editor-alt-text-mark-decorative-description = Taxtiṛt-a tettwaseqdacay i tugniwin n ucebbaḥ, am tamiwin neɣ i tecraḍ tifrawanin.
 pdfjs-editor-alt-text-cancel-button = Sefsex
 pdfjs-editor-alt-text-save-button = Sekles
 pdfjs-editor-alt-text-decorative-tooltip = Yettwacreḍ d adlag
+# .placeholder: This is a placeholder for the alt text input area
+pdfjs-editor-alt-text-textarea =
+    .placeholder = D amedya, “Yiwen yilemẓi iqqim ɣer ṭṭabla,ad yečč imekli”
+# Alternative text (alt text) helps when people can't see the image.
+pdfjs-editor-alt-text-button =
+    .aria-label = Aḍris amaskal
 
 ## Editor resizers
 ## This is used in an aria label to help to understand the role of the resizer.
@@ -422,6 +465,8 @@ pdfjs-editor-highlight-show-all-button =
 ## New alt-text dialog
 ## Group note for entire feature: Alternative text (alt text) helps when people can't see the image. This feature includes a tool to create alt text automatically using an AI model that works locally on the user's device to preserve privacy.
 
+# Modal header positioned above a text box where users can edit the alt text.
+pdfjs-editor-new-alt-text-dialog-edit-label = Ẓreg aḍris niḍen (aglam n tugna)
 # Modal header positioned above a text box where users can add the alt text.
 pdfjs-editor-new-alt-text-dialog-add-label = Rnu aḍris niḍen (aglam n tugna)
 pdfjs-editor-new-alt-text-textarea =
@@ -434,6 +479,7 @@ pdfjs-editor-new-alt-text-error-close-button = Mdel
 
 ## Image alt-text settings
 
+pdfjs-editor-alt-text-settings-create-model-button-label = Rnu aḍris niḍen s wudem awurman
 pdfjs-editor-alt-text-settings-delete-model-button = Kkes
 pdfjs-editor-alt-text-settings-download-model-button = Sader
 pdfjs-editor-alt-text-settings-downloading-model-button = Asader…
@@ -441,27 +487,61 @@ pdfjs-editor-alt-text-settings-close-button = Mdel
 
 ## "Annotations removed" bar
 
+pdfjs-editor-undo-bar-message-freetext = Aḍris yettwakkes
+pdfjs-editor-undo-bar-message-ink = Asuneɣ yettwakkes
+pdfjs-editor-undo-bar-message-stamp = Tugna tettwakkes
+pdfjs-editor-undo-bar-message-signature = Azmul yettwakkes
+pdfjs-editor-undo-bar-undo-button =
+    .title = Sefsex
+pdfjs-editor-undo-bar-undo-button-label = Sefsex
+pdfjs-editor-undo-bar-close-button =
+    .title = Mdel
+pdfjs-editor-undo-bar-close-button-label = Mdel
 
 ## Add a signature dialog
 
+pdfjs-editor-add-signature-dialog-title = Rnu azmul
 
 ## Tab names
 
+# Type is a verb (you can type your name as signature)
+pdfjs-editor-add-signature-type-button = Anaw
+    .title = Anaw
+# Draw is a verb (you can draw your signature)
+pdfjs-editor-add-signature-draw-button = Suneɣ
+    .title = Suneɣ
+pdfjs-editor-add-signature-image-button = Tugna
+    .title = Tugna
 
 ## Tab panels
 
+pdfjs-editor-add-signature-type-input =
+    .aria-label = Zru azmul-ik
+    .placeholder = Zru azmul-ik
+pdfjs-editor-add-signature-draw-placeholder = Suneɣ azmul-ik
 
 ## Controls
 
+pdfjs-editor-add-signature-description-default-when-drawing = Azmul
+pdfjs-editor-add-signature-clear-button-label = Sfeḍ azmul
+pdfjs-editor-add-signature-clear-button =
+    .title = Sfeḍ azmul
+pdfjs-editor-add-signature-save-checkbox = Sekles azmul
+pdfjs-editor-add-signature-error-close-button = Mdel
 
 ## Dialog buttons
 
+pdfjs-editor-add-signature-cancel-button = Semmet
+pdfjs-editor-add-signature-add-button = Rnu
+pdfjs-editor-edit-signature-update-button = Leqqem
 
 ## Main menu for adding/removing signatures
 
 
 ## Editor toolbar
 
+pdfjs-editor-add-signature-edit-button-label = Ẓreg aglam
 
 ## Edit signature description dialog
 
+pdfjs-editor-edit-signature-dialog-title = Ẓreg aglam
diff --git a/l10n/kk/viewer.ftl b/l10n/kk/viewer.ftl
index c2dee763b..cd6f30b94 100644
--- a/l10n/kk/viewer.ftl
+++ b/l10n/kk/viewer.ftl
@@ -322,6 +322,8 @@ pdfjs-editor-signature-button-label = Қолтаңбаны қосу
 
 ## Default editor aria labels
 
+pdfjs-editor-stamp-editor =
+    .aria-label = Сурет редакторы
 
 ## Remove button for the various kind of editor.
 
@@ -351,6 +353,16 @@ pdfjs-editor-stamp-add-image-button-label = Суретті қосу
 pdfjs-editor-free-highlight-thickness-input = Қалыңдығы
 pdfjs-editor-free-highlight-thickness-title =
     .title = Мәтіннен басқа элементтерді ерекшелеу кезінде қалыңдықты өзгерту
+pdfjs-editor-add-signature-container =
+    .aria-label = Қолтаңбаларды басқару және сақталған қолтаңбалар
+pdfjs-editor-signature-add-signature-button =
+    .title = Жаңа қолтаңбаны қосу
+pdfjs-editor-signature-add-signature-button-label = Жаңа қолтаңбаны қосу
+# Used on the button to use an already saved signature.
+# Variables:
+#   $description (String) - a string describing/labeling the signature.
+pdfjs-editor-add-saved-signature-button =
+    .title = Сақталған қолтаңба: { $description }
 # .default-content is used as a placeholder in an empty text editor.
 pdfjs-free-text2 =
     .aria-label = Мәтін түзеткіші
@@ -507,6 +519,7 @@ pdfjs-editor-undo-bar-message-highlight = Ерекшелеу өшірілді
 pdfjs-editor-undo-bar-message-freetext = Мәтін өшірілді
 pdfjs-editor-undo-bar-message-ink = Сызба өшірілді
 pdfjs-editor-undo-bar-message-stamp = Сурет өшірілді
+pdfjs-editor-undo-bar-message-signature = Қолтаңба өшірілді
 # Variables:
 #   $count (Number) - the number of removed annotations.
 pdfjs-editor-undo-bar-message-multiple =
diff --git a/l10n/ml/viewer.ftl b/l10n/ml/viewer.ftl
index f93e52903..6935c66ee 100644
--- a/l10n/ml/viewer.ftl
+++ b/l10n/ml/viewer.ftl
@@ -102,7 +102,7 @@ pdfjs-document-properties-mb = { $size_mb } എംബി ({ $size_b } ബൈറ
 pdfjs-document-properties-title = തലക്കെട്ട്‌
 pdfjs-document-properties-author = രചയിതാവ്:
 pdfjs-document-properties-subject = വിഷയം:
-pdfjs-document-properties-keywords = മുഖ്യപദങ്ങൾ
+pdfjs-document-properties-keywords = പെരുമുരികൾ:
 pdfjs-document-properties-creation-date = പൂര്‍ത്തിയാകുന്ന തീയതി:
 pdfjs-document-properties-modification-date = മാറ്റം വരുത്തിയ തീയതി:
 # Variables:
@@ -342,6 +342,9 @@ pdfjs-editor-alt-text-dialog-label = സാധ്യത തിരഞ്ഞെട
 pdfjs-editor-alt-text-add-description-label = ഒരു വിവരണം ചേർക്കുക
 pdfjs-editor-alt-text-cancel-button = റദ്ദാക്കുക
 pdfjs-editor-alt-text-save-button = കരുതിവയ്ക്കുക
+# .placeholder: This is a placeholder for the alt text input area
+pdfjs-editor-alt-text-textarea =
+    .placeholder = ഉദാഹരണം, “ഒരു ചെറുപ്പക്കാരൻ ഭക്ഷണം കഴിക്കാൻ മേശയിലിരുന്നു”
 # Alternative text (alt text) helps when people can't see the image.
 pdfjs-editor-alt-text-button =
     .aria-label = മറുയെഴുത്തു്
@@ -392,10 +395,13 @@ pdfjs-editor-new-alt-text-dialog-edit-label = മറുയെഴുത്തു
 pdfjs-editor-new-alt-text-dialog-add-label = മറുയെഴുത്തു് ചേൎക്കുക (ചിത്ര വിവരണം)
 pdfjs-editor-new-alt-text-textarea =
     .placeholder = താങ്ങളുടെ വിവരണം ഇവിടെ എഴുതുക...
+# This is a required legal disclaimer that refers to the automatically created text inside the alt text box above this text. It disappears if the text is edited by a human.
+pdfjs-editor-new-alt-text-disclaimer1 = ഈ മറുയെഴുത്തു് തന്നെതാനെയുണ്ടാക്കിയതുകൊണ്ടു് തെറ്റായതാവാം.
 pdfjs-editor-new-alt-text-disclaimer-learn-more-url = കൂടുതല്‍ അറിയുക
 pdfjs-editor-new-alt-text-create-automatically-button-label = തന്നെതാനെ മറുയെഴുത്തു് ഉണ്ടാക്കുക
 pdfjs-editor-new-alt-text-not-now-button = ഇപ്പോഴല്ല
 pdfjs-editor-new-alt-text-error-title = തന്നെതാനെ മറുയെഴുത്തു് ഉണ്ടാക്കാൻ പറ്റിയില്ല
+pdfjs-editor-new-alt-text-error-description = തനതായ മറുയെഴുത്തു് ഇടുക അല്ലെങ്കിൽ പിന്നീടു് ശ്രമിയ്ക്കുക.
 pdfjs-editor-new-alt-text-error-close-button = അടയ്ക്കുക
 # This is a button that users can click to edit the alt text they have already added.
 pdfjs-editor-new-alt-text-added-button =
@@ -425,6 +431,7 @@ pdfjs-editor-alt-text-settings-create-model-button-label = തന്നെതാ
 pdfjs-editor-alt-text-settings-delete-model-button = മായ്ക്കുക
 pdfjs-editor-alt-text-settings-download-model-button = ഇറക്കിവയ്ക്കുക
 pdfjs-editor-alt-text-settings-downloading-model-button = ഇറക്കിവയ്ക്കുന്നു
+pdfjs-editor-alt-text-settings-show-dialog-description = താങ്ങളുടെ എല്ലാ പടങ്ങളിലും മറുയെഴുത്തുണ്ടെന്നു് തീൎച്ചപ്പെടുത്താൻ തുണയ്ക്കുന്നു.
 pdfjs-editor-alt-text-settings-close-button = അടയ്ക്കുക
 
 ## "Annotations removed" bar
@@ -504,6 +511,9 @@ pdfjs-editor-edit-signature-update-button = പുതുക്കുക
 
 ## Main menu for adding/removing signatures
 
+pdfjs-editor-delete-signature-button1 =
+    .title = കരുതിവച്ച ഒപ്പു് മാറ്റുക
+pdfjs-editor-delete-signature-button-label1 = കരുതിവച്ച ഒപ്പു് മാറ്റുക
 
 ## Editor toolbar
 
diff --git a/l10n/nn-NO/viewer.ftl b/l10n/nn-NO/viewer.ftl
index 950e89b1f..b24e93f94 100644
--- a/l10n/nn-NO/viewer.ftl
+++ b/l10n/nn-NO/viewer.ftl
@@ -325,6 +325,11 @@ pdfjs-editor-signature-button-label = Legg til signatur
 # “Highlight” is a noun, the string is used on the editor for highlights.
 pdfjs-editor-highlight-editor =
     .aria-label = Markeringsredigerar
+# Used when a signature editor is selected/hovered.
+# Variables:
+#   $description (String) - a string describing/labeling the signature.
+pdfjs-editor-signature-editor1 =
+    .aria-description = Signatur-redigerar: { $description }
 pdfjs-editor-stamp-editor =
     .aria-label = Bildredigerar
 
diff --git a/l10n/sq/viewer.ftl b/l10n/sq/viewer.ftl
index dca3112dd..dc402cc75 100644
--- a/l10n/sq/viewer.ftl
+++ b/l10n/sq/viewer.ftl
@@ -319,6 +319,11 @@ pdfjs-editor-highlight-editor =
 # “Drawing” is a noun, the string is used on the editor for drawings.
 pdfjs-editor-ink-editor =
     .aria-label = Përpunues vizatimesh
+# Used when a signature editor is selected/hovered.
+# Variables:
+#   $description (String) - a string describing/labeling the signature.
+pdfjs-editor-signature-editor1 =
+    .aria-description = Përpunues nënshkrimesh: { $description }
 pdfjs-editor-stamp-editor =
     .aria-label = Përpunues figurash