diff --git a/sonoff/language/cs-CZ.h b/sonoff/language/cs-CZ.h
index a2978747c..23c01a1b3 100644
--- a/sonoff/language/cs-CZ.h
+++ b/sonoff/language/cs-CZ.h
@@ -463,14 +463,14 @@
 #define D_HX_CAL_FAIL "Chyba kalibrace"
 
 //xsns_35_tx20.ino
-#define D_TX20_WIND_DIRECTION "Wind Direction"
-#define D_TX20_WIND_SPEED "Wind Speed"
-#define D_TX20_WIND_SPEED_AVG "Wind Speed Avg"
-#define D_TX20_WIND_SPEED_MAX "Wind Speed Max"
-#define D_TX20_NORTH "N"
-#define D_TX20_EAST "E"
-#define D_TX20_SOUTH "S"
-#define D_TX20_WEST "W"
+#define D_TX20_WIND_DIRECTION "Směr větru"
+#define D_TX20_WIND_SPEED "Rychlost větru"
+#define D_TX20_WIND_SPEED_AVG "Průměrná rychlost větru"
+#define D_TX20_WIND_SPEED_MAX "Maximální rychlost větru"
+#define D_TX20_NORTH "S"
+#define D_TX20_EAST "V"
+#define D_TX20_SOUTH "J"
+#define D_TX20_WEST "Z"
 
 // sonoff_template.h
 #define D_SENSOR_NONE     "Není"
@@ -525,7 +525,7 @@
 #define D_UNIT_HOUR "hod"
 #define D_UNIT_KILOGRAM "kg"
 #define D_UNIT_INCREMENTS "inc"
-#define D_UNIT_KILOMETER_PER_HOUR "kmph"  // or "km/h"
+#define D_UNIT_KILOMETER_PER_HOUR "km/h"  // or "km/h"
 #define D_UNIT_KILOOHM "kOhm"
 #define D_UNIT_KILOWATTHOUR "kWh"
 #define D_UNIT_LUX "lx"