corrections in output texts

added separator after language change

src/Game.java

@@ -79,6 +79,7 @@ public class Game {
      * @param language Spielsprache welche zur Verfügung stehen "de","en","vn"
      */
     public void changeLanguage(String language) {
+        this.gamefield.outputSeparator();
         this.language.setOutputLanguage(language);
     }
 

src/Language.java

@@ -52,9 +52,9 @@ public class Language {
             return true;
         }
         System.out.println(checkLanguage(
-                "Diese Sprache ist nicht zulässig",
-                "This Language is not valid",
-                "Ngôn ngữ này không được phép"));
+                "Diese Sprache ist nicht zulässig.",
+                "This language is not valid.",
+                "Ngôn ngữ này không được phép."));
         return false;
     }
 
@@ -78,8 +78,8 @@ public class Language {
     public void outputMoveText(int move, int player) {
         System.out.println(checkLanguage(
                 "Spiezug: " + move + ", Spieler " + player + " spielt.",
-                "Move: " + move + ", Player " + player + "plays",
-                "Di chuyển: " + move + ", Người " + player + " chơi"
+                "Move: " + move + ", Player " + player + " plays.",
+                "Di chuyển: " + move + ", Người " + player + " chơi."
         ));
     }