diff --git a/lang/cs.php b/lang/cs.php
index 3a3d4b9..f63cc21 100644
--- a/lang/cs.php
+++ b/lang/cs.php
@@ -43,7 +43,7 @@ $langSetup["startbutton"] = "Stiskněte pro spuštění";
 $langSetup["restartbutton"] = "Restart";
 $langSetup["optionwarn"] = "Možnost konfigurace PHP %s musí být nastavena na %s."; // substitutes option name and value
 $langSetup["extensionwarn"] = "Požadované rozšíření PHP %s není k dispozici."; // substitutes extension name
-$langSetup["notwritable"] = "Folder '%s' must be writable by PHP."; // substitutes folder path
+$langSetup["notwritable"] = "Složka '%s' musí být zapisovatelná pomocí PHP."; // substitutes folder path
 
 
 // application strings
@@ -61,9 +61,9 @@ $lang["close"] = "zavřít";
 $lang["time"] = "Čas";
 $lang["speed"] = "Rychlost";
 $lang["accuracy"] = "Přesnost";
-$lang["position"] = "Position";
+$lang["position"] = "Poloha";
 $lang["altitude"] = "Výška";
-$lang["bearing"] = "Bearing";
+$lang["bearing"] = "Vztah";
 $lang["ttime"] = "Celkový čas";
 $lang["aspeed"] = "Průměrná rychlost";
 $lang["tdistance"] = "Celková vzdálenost";
@@ -81,7 +81,7 @@ $lang["units"] = "Jednotky";
 $lang["metric"] = "Metrický";
 $lang["imperial"] = "Imperiální / US";
 $lang["nautical"] = "Námořní";
-$lang["admin"] = "Administrator";
+$lang["admin"] = "Administrátor";
 $lang["adminmenu"] = "Administrace";
 $lang["passwordrepeat"] = "Opakovat heslo";
 $lang["passwordenter"] = "Zadejte heslo";
@@ -113,12 +113,12 @@ $lang["editingtrack"] = "Upravujete trasu %s"; // substitutes track name
 $lang["deltrack"] = "Odstranit trasu";
 $lang["trackname"] = "Název trasy";
 $lang["edittrack"] = "Upravit trasu";
-$lang["positiondelwarn"] = "Warning!\n\nYou are going to permanently delete position %d of track %s.\n\nAre you sure?"; // substitutes position index and track name
-$lang["editingposition"] = "You are editing position #%d of track %s"; // substitutes position index and track name
+$lang["positiondelwarn"] = "Varování!\n\nChcete trvale smazat polohu %d stopy %s. \n\nJste si jistý?"; // substitutes position index and track name
+$lang["editingposition"] = "Upravujete pozici číslo%d stopy %s"; // substitutes position index and track name
 $lang["delposition"] = "Odstranit pozici";
-$lang["delimage"] = "Remove image";
+$lang["delimage"] = "Odstranit obrázek";
 $lang["comment"] = "Komentář";
-$lang["image"] = "Image";
+$lang["image"] = "Obrázek";
 $lang["editposition"] = "Upravit pozici";
 $lang["passlenmin"] = "Heslo musí být alespoň %d znaků"; // substitutes password minimum length
 $lang["passrules_1"] = "Mělo by obsahovat alespoň jedno malé písmeno, jedno velké písmeno";
@@ -144,31 +144,31 @@ $lang["unitft"] = "ft"; // feet
 $lang["unitmi"] = "mi"; // mile
 $lang["unitkt"] = "kt"; // knot
 $lang["unitnm"] = "nm"; // nautical mile
-$lang["config"] = "Settings";
-$lang["editingconfig"] = "Default application settings";
-$lang["latitude"] = "Initial latitude";
-$lang["longitude"] = "Initial longitude";
+$lang["config"] = "Nastavení";
+$lang["editingconfig"] = "Výchozí nastavení aplikace";
+$lang["latitude"] = "Počáteční zeměpisná šířka";
+$lang["longitude"] = "Počáteční zeměpisná délka";
 $lang["interval"] = "Interval (s)";
 $lang["googlekey"] = "Google Maps API key";
-$lang["passlength"] = "Minimum password length";
-$lang["passstrength"] = "Minimum password strength";
-$lang["requireauth"] = "Require authorization";
-$lang["publictracks"] = "Public tracks";
-$lang["strokeweight"] = "Stroke weight";
-$lang["strokeopacity"] = "Stroke opacity";
-$lang["strokecolor"] = "Stroke color";
-$lang["colornormal"] = "Marker color";
-$lang["colorstart"] = "Start marker color";
-$lang["colorstop"] = "Stop marker color";
-$lang["colorextra"] = "Extra marker color";
-$lang["colorhilite"] = "Hilite marker color";
-$lang["uploadmaxsize"] = "Maximum upload size (MB)";
-$lang["ollayers"] = "OpenLayers layer";
-$lang["layername"] = "Layer name";
-$lang["layerurl"] = "Layer URL";
-$lang["add"] = "Add";
-$lang["edit"] = "Edit";
-$lang["delete"] = "Delete";
-$lang["settings"] = "Settings";
-$lang["trackcolor"] = "Track color";
+$lang["passlength"] = "Minimální délka hesla";
+$lang["passstrength"] = "Minimální síla hesla";
+$lang["requireauth"] = "Vyžaduje autorizaci";
+$lang["publictracks"] = "Veřejné trasy";
+$lang["strokeweight"] = "Síla tahu";
+$lang["strokeopacity"] = "Průhlednost tahu";
+$lang["strokecolor"] = "Barva tahu";
+$lang["colornormal"] = "Barva značky";
+$lang["colorstart"] = "Barva značky Start";
+$lang["colorstop"] = "Barva značky Stop";
+$lang["colorextra"] = "Extra značkovací barva";
+$lang["colorhilite"] = "Zvýrazněná značkovací barva";
+$lang["uploadmaxsize"] = "Maximální velikost nahrávaného souboru (MB)";
+$lang["ollayers"] = "vrstva OpenLayers";
+$lang["layername"] = "Název vrstvy";
+$lang["layerurl"] = "URL vrstvy";
+$lang["add"] = "Přidat";
+$lang["edit"] = "Upravit";
+$lang["delete"] = "Smazat";
+$lang["settings"] = "Nastavení";
+$lang["trackcolor"] = "Barva stopy";
 ?>