EN : fix of Czech non translated text

Author: VitSimon

en/event.md

@@ -69,12 +69,12 @@ Plugins.catalogize(pEventPlugin);
 In the handler code, you can then trigger events as follows:
 
 ```javascript
-      const eventName = EventNames.MyNewEvent; //nebo: 'MyNewEvent'
+      const eventName = EventNames.MyNewEvent; //or: 'MyNewEvent'
 
       sendEvent(eventName, (r) => {
         r.id = aliasName;
         r.result = loadedCount;
-        //vyplnění dalších potřebných dat
+        //fill another data of event
       });
 ```
 

en/uibutton.md

@@ -22,7 +22,7 @@ The component defines a standard HTML button that is modified by the CSS class *
   }
 
   _buttonAction(evt) {
-    alert('Ahoj.');
+    alert('Ahoy.');
   }
 ```