diff --git a/sonoff/language/cs-CZ.h b/sonoff/language/cs-CZ.h
index ce2e95fe2..284500917 100644
--- a/sonoff/language/cs-CZ.h
+++ b/sonoff/language/cs-CZ.h
@@ -28,7 +28,7 @@
  * Use online command StateText to translate ON, OFF, HOLD and TOGGLE.
  * Use online command Prefix to translate cmnd, stat and tele.
  *
- * Updated until v6.2.1.14
+ * Updated until v6.5.0.9
 \*********************************************************************/
 
 //#define LANGUAGE_MODULE_NAME         // Enable to display "Module Generic" (ie Spanish), Disable to display "Generic Module" (ie English)
@@ -256,7 +256,7 @@
 
 #define D_MODULE_PARAMETERS "Nastavení modulu"
 #define D_MODULE_TYPE "Typ modulu"
-#define D_PULLUP_ENABLE "No Button/Switch pull-up"
+#define D_PULLUP_ENABLE "Tlačítko/Spínač bez pull-up"
 #define D_GPIO "GPIO"
 #define D_SERIAL_IN "Serial In"
 #define D_SERIAL_OUT "Serial Out"
@@ -291,8 +291,8 @@
 #define D_TELEMETRY_PERIOD "Interval telemetrie"
 
 #define D_OTHER_PARAMETERS "Další nastavení"
-#define D_TEMPLATE "Template"
-#define D_ACTIVATE "Activate"
+#define D_TEMPLATE "Šablona"
+#define D_ACTIVATE "Aktivovat"
 #define D_WEB_ADMIN_PASSWORD "Heslo Web administrátora"
 #define D_MQTT_ENABLE "MQTT aktivní"
 #define D_FRIENDLY_NAME "Friendly Name"
@@ -301,14 +301,14 @@
 #define D_SINGLE_DEVICE "single device"
 #define D_MULTI_DEVICE "multi device"
 
-#define D_CONFIGURE_TEMPLATE "Configure Template"
-#define D_TEMPLATE_PARAMETERS "Template parameters"
-#define D_TEMPLATE_NAME "Name"
-#define D_BASE_TYPE "Based on"
-#define D_TEMPLATE_FLAGS "Options"
-#define D_ALLOW_ADC0 "ADC0 input"
-#define D_ALLOW_ADC0_TEMP "ADC0 temperature"
-#define D_ALLOW_PULLUP "User pull-up selection"
+#define D_CONFIGURE_TEMPLATE "Nastavení šablony"
+#define D_TEMPLATE_PARAMETERS "Parametry šablony"
+#define D_TEMPLATE_NAME "Název"
+#define D_BASE_TYPE "Vzor z"
+#define D_TEMPLATE_FLAGS "Volby"
+#define D_ALLOW_ADC0 "ADC0 vstup"
+#define D_ALLOW_ADC0_TEMP "ADC0 teplota"
+#define D_ALLOW_PULLUP "Pull-up volba uživatele"
 
 #define D_SAVE_CONFIGURATION "Ulož nastavení"
 #define D_CONFIGURATION_SAVED "Nastavení uloženo"
@@ -599,9 +599,9 @@
 #define D_UNIT_KILOOHM "kOhm"
 #define D_UNIT_KILOWATTHOUR "kWh"
 #define D_UNIT_LUX "lx"
-#define D_UNIT_MICROGRAM_PER_CUBIC_METER "ug/m3"
-#define D_UNIT_MICROMETER "um"
-#define D_UNIT_MICROSECOND "us"
+#define D_UNIT_MICROGRAM_PER_CUBIC_METER "µg/m³"
+#define D_UNIT_MICROMETER "µm"
+#define D_UNIT_MICROSECOND "µs"
 #define D_UNIT_MILLIAMPERE "mA"
 #define D_UNIT_MILLIMETER "mm"
 #define D_UNIT_MILLIMETER_MERCURY "mmHg"