diff --git a/share/msgdef/cs_CZ.ISO8859-2.src b/share/msgdef/cs_CZ.ISO8859-2.src
index 105b51d98f6d..a6fc83634397 100644
--- a/share/msgdef/cs_CZ.ISO8859-2.src
+++ b/share/msgdef/cs_CZ.ISO8859-2.src
@@ -7,4 +7,8 @@
 ^[aAyY].*
 # noexpr
 ^[nN].*
+# yesstr
+ano
+# nostr
+ne
 # EOF
diff --git a/share/msgdef/cs_CZ.ISO_8859-2.src b/share/msgdef/cs_CZ.ISO_8859-2.src
index 105b51d98f6d..a6fc83634397 100644
--- a/share/msgdef/cs_CZ.ISO_8859-2.src
+++ b/share/msgdef/cs_CZ.ISO_8859-2.src
@@ -7,4 +7,8 @@
 ^[aAyY].*
 # noexpr
 ^[nN].*
+# yesstr
+ano
+# nostr
+ne
 # EOF