diff --git a/translations/README.md b/translations/README.md
index 86c9ff2..7e79870 100644
--- a/translations/README.md
+++ b/translations/README.md
@@ -27,33 +27,51 @@ Creating a new translation
 Updating an existing translation
 --------------------------------
 
-1. Move the existing .po file:
+Use `update-translations.py` to update one or more PO files.
 
-        $ mv ja.po old.po
+Here is an example with `ja.po` and `ko.po`:
 
-2. Create an empty .po file for the translation:
+Command-line:
+```sh
+./update-translations.py ja.po ko.po
+```
 
-        $ xgettext -s -o diffuse.pot -L Python ../src/usr/bin/diffuse
-        $ msginit -l ja -o empty.po -i diffuse.pot
+Output:
+```
+Generate 'diffuse.pot'.
+Updating translation file 'ja.po'...
+Created /tmp/tmp0gtniydu/ja.empty.po.
+Validate ja.po:
+183 translated messages, 2 untranslated messages.
+Update done.
+Updating translation file 'ko.po'...
+Created /tmp/tmp0gtniydu/ko.empty.po.
+Validate ko.po:
+183 translated messages, 2 untranslated messages.
+Update done.
+```
 
-3. Merge the old translations:
-
-        $ msgmerge old.po empty.po -o ja.po
-
-4. Clean up:
-
-        $ rm old.po empty.po
-
-5. Manually complete in the translations in the .po file:
-
-        $ vi ja.po
+Then use the text editor of your choice to complete the translations.
 
 Validate a translation
 ----------------------
 
-1. Attempt to compile the .po file and note any warnings:
+Use `update-translations.py` to validate one or more PO files.
 
-        $ msgfmt -c -v ja.po
+Here is an example with `ja.po` and `ko.po`:
+
+Command-line:
+```sh
+./update-translations.py --check-only ja.po ko.po
+```
+
+Output:
+```
+Validate ja.po:
+183 translated messages, 2 untranslated messages.
+Validate ko.po:
+183 translated messages, 2 untranslated messages.
+```
 
 System Integration
 ==================
diff --git a/translations/update-translations.py b/translations/update-translations.py
index f58bb73..8c3e63c 100755
--- a/translations/update-translations.py
+++ b/translations/update-translations.py
@@ -19,6 +19,7 @@
 # (http://www.fsf.org/) or by writing to the Free Software Foundation, Inc.,
 # 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
+import argparse
 import glob
 import os
 import subprocess
@@ -28,6 +29,9 @@ import tempfile
 def generate_pot_file():
     subprocess.run(["xgettext", "-s", "-o", "diffuse.pot", "-L", "Python", "../src/usr/bin/diffuse"])
 
+def check_translation(filename):
+    subprocess.run(["msgfmt", "-c", "-v", filename])
+
 def update_translation(filename):
     print(f"Updating translation file '{filename}'...")
 
@@ -46,21 +50,42 @@ def update_translation(filename):
     subprocess.run(["msgmerge", "-q", "--no-wrap", tmpfile, emptypofile, "-o", filename])
 
     # Validate translation
-    print(f"Validation:")
-    subprocess.run(["msgfmt", "-c", "-v", filename])
+    print(f"Validate {filename}:")
+    check_translation(filename)
 
     print(f"Update done.")
 
-# Generate diffuse.pot file
-generate_pot_file()
+# Setup argument parser
+parser = argparse.ArgumentParser(description='Update translation files (.po).')
+parser.add_argument('po_files', metavar='filename.po', nargs='+',
+                    help='the translation file')
+parser.add_argument('-c', '--check-only', action='store_true',
+                    help='check the PO files')
+parser.add_argument('--no-pot-generation', action='store_true',
+                    help='don\'t generate the POT file')
+
+# Parse command-line arguments
+args = parser.parse_args()
+
+# Get PO files from command-line
+po_files = args.po_files
+po_files.sort()
+
+if args.check_only:
+    for file in po_files:
+        print(f"Validate {file}:")
+        check_translation(file)
+    exit(0)
+
+if not args.no_pot_generation:
+    # Generate diffuse.pot file
+    print("Generate 'diffuse.pot'.")
+    generate_pot_file()
 
 # Create temporary working directory
 tmpdir = tempfile.mkdtemp()
-
 try:
     # Update PO files
-    po_files = glob.glob("*.po", recursive=False)
-    po_files.sort()
     for file in po_files:
         update_translation(file)
 finally: