diff --git a/i18n/cs.json b/i18n/cs.json
index 450a4fc5..9e94dfae 100644
--- a/i18n/cs.json
+++ b/i18n/cs.json
@@ -29,77 +29,77 @@
     "Discussion": "Komentáře",
     "Toggle navigation": "Toggle navigation",
     "%d seconds": [
-        "%d second (singular)",
-        "%d seconds (1st plural)",
-        "%d seconds (2nd plural)",
+        "%d sekuda",
+        "%d sekundy",
+        "%d sekund",
         "%d seconds (3rd plural)"
     ],
     "%d minutes": [
-        "%d minute (singular)",
-        "%d minutes (1st plural)",
-        "%d minutes (2nd plural)",
+        "%d minuta",
+        "%d minuty",
+        "%d minut",
         "%d minutes (3rd plural)"
     ],
     "%d hours": [
-        "%d hour (singular)",
-        "%d hours (1st plural)",
-        "%d hours (2nd plural)",
+        "%d hodin",
+        "%d hodiny",
+        "%d hodin",
         "%d hours (3rd plural)"
     ],
     "%d days": [
-        "%d day (singular)",
-        "%d days (1st plural)",
-        "%d days (2nd plural)",
+        "%d den",
+        "%d dny",
+        "%d dní",
         "%d days (3rd plural)"
     ],
     "%d weeks": [
-        "%d week (singular)",
-        "%d weeks (1st plural)",
-        "%d weeks (2nd plural)",
+        "%d týden",
+        "%d týdeny",
+        "%d týdnů",
         "%d weeks (3rd plural)"
     ],
     "%d months": [
-        "%d month (singular)",
-        "%d months (1st plural)",
-        "%d months (2nd plural)",
+        "%d měsíc",
+        "%d měsíce",
+        "%d měsíců",
         "%d months (3rd plural)"
     ],
     "%d years": [
-        "%d year (singular)",
-        "%d years (1st plural)",
-        "%d years (2nd plural)",
+        "%d rok",
+        "%d roky",
+        "%d roků",
         "%d years (3rd plural)"
     ],
     "Never": "Nikdy",
     "Note: This is a test service: Data may be deleted anytime. Kittens will die if you abuse this service.": "Note: This is a test service: Data may be deleted anytime. Kittens will die if you abuse this service.",
     "This document will expire in %d seconds.": [
-        "This document will expire in %d second. (singular)",
-        "This document will expire in %d seconds (1st plural)",
-        "This document will expire in %d seconds (2nd plural)",
+        "Tento dokument expiruje za %d sekundu.",
+        "Tento dokument expiruje za %d sekundy.",
+        "Tento dokument expiruje za %d sekund.",
         "This document will expire in %d seconds (3rd plural)"
     ],
     "This document will expire in %d minutes.": [
-        "This document will expire in %d minute. (singular)",
-        "This document will expire in %d minutes (1st plural)",
-        "This document will expire in %d minutes (2nd plural)",
+        "Tento dokument expiruje za %d minutu.",
+        "Tento dokument expiruje za %d minuty.",
+        "Tento dokument expiruje za %d minut.",
         "This document will expire in %d minutes (3rd plural)"
     ],
     "This document will expire in %d hours.": [
-        "This document will expire in %d hour. (singular)",
-        "This document will expire in %d hours (1st plural)",
-        "This document will expire in %d hours (2nd plural)",
+        "Tento dokument expiruje za %d hodinu.",
+        "Tento dokument expiruje za %d hodiny.",
+        "Tento dokument expiruje za %d hodin.",
         "This document will expire in %d hours (3rd plural)"
     ],
     "This document will expire in %d days.": [
-        "This document will expire in %d day. (singular)",
-        "This document will expire in %d days (1st plural)",
-        "This document will expire in %d days (2nd plural)",
+        "Tento dokument expiruje za %d den.",
+        "Tento dokument expiruje za %d dny.",
+        "Tento dokument expiruje za %d dny.",
         "This document will expire in %d days (3rd plural)"
     ],
     "This document will expire in %d months.": [
-        "This document will expire in %d month. (singular)",
-        "This document will expire in %d months (1st plural)",
-        "This document will expire in %d months (2nd plural)",
+        "Tento dokument expiruje za %d měsíc.",
+        "Tento dokument expiruje za %d měsíce.",
+        "Tento dokument expiruje za %d měsíců.",
         "This document will expire in %d months (3rd plural)"
     ],
     "Please enter the password for this paste:": "Zadejte prosím heslo:",