added czech

Js/Main.js

@@ -10,7 +10,7 @@ const shaders = new Shaders();
 const textFunc = new TextFunctions();
 let audio = undefined; //Cant create a audio context without user input.
 const player = new Player(pixiApp, utage, textFunc, audio, shaders);
-const languages = ["eng", "jpn", "rus", "enm", "kor", "zho"];
+const languages = ["eng", "jpn", "rus", "cze", "enm", "kor", "zho"];
 const version = "YameteTomete XDUPlayer V1.5.0";
 let bodyLoaded = false;
 let utageLoaded = false;