Fix typo (Langage => Language)

* Fix typos (Langage => Language) found by @LordStephen77
* Rename variable/method name to plural since there are (and can be) several supported languages supported (to avoid confusion)

Author: pH-7

src/simplejavatexteditor/SupportedKeywords.java

@@ -12,7 +12,7 @@
  */
 public class SupportedKeywords {
 
-    private String[] supportedLangage = {".cpp",".java"};
+    private String[] supportedLanguages = {".cpp",".java"};
 
     private String[] java = {"abstract", "assert", "boolean",
             "break", "byte", "case", "catch", "char", "class", "const",
@@ -33,8 +33,8 @@ public class SupportedKeywords {
                 "template", "typename", "class", "friend", "private", "this", "using", "const_cast",
                 "inline", "public", "throw", "virtual", "delete", "mutable", "protected", "true", "wchar_t" };
 
-    public String[] getSupportedLangage() {
-        return supportedLangage;
+    public String[] getSupportedLanguages() {
+        return supportedLanguages;
     }
 
     private String[] brackets = { "{", "(" };

src/simplejavatexteditor/UI.java

@@ -400,7 +400,7 @@ public void enableAutoComplete(File file) {
         }
 
         ArrayList<String> arrayList;
-        String[] list = kw.getSupportedLangage();
+        String[] list = kw.getSupportedLanguages();
 
         for (int i = 0; i < list.length; i++) {
             if (file.getName().endsWith(list[i])) {
@@ -446,7 +446,7 @@ else if (e.getSource() == newFile || e.getSource() == newButton) {
                 Object[] options = {"Save", "No Save", "Return"};
                 int n = JOptionPane.showOptionDialog(this, "Do you want to save the file at first ?", "Question",
                         JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[2]);
-                if (n == 0) {// save 
+                if (n == 0) {// save
                     saveFile();
                     edit = false;
                 } else if (n == 1) {