Add Arabic translation contribution info

README.md

@@ -69,3 +69,4 @@ OpenRocket needs help to become even better. Implementing features, writing docu
 - Vladimir Beran
 - Polish Rocketry Society / Łukasz & Alex Kazanski
 - Sibo Van Gool
+- Mohamed Amin Elkebsi

swing/src/net/sf/openrocket/gui/dialogs/AboutDialog.java

@@ -56,6 +56,7 @@ public class AboutDialog extends JDialog {
 		"Vladimir Beran (Czech)<br>" +
 		"Polish Rocketry Society / \u0141ukasz & Alex Kazanski (Polish)<br>" +
 		"Sibo Van Gool (Dutch)<br>" +
+		"Mohamed Amin Elkebsi (Arabic)<br>" +
 		"<br>" +
 		"See all contributors at <br>" + href("https://github.com/openrocket/openrocket/graphs/contributors", false, false) + "<br>" +
 		"<br>" +

swing/src/net/sf/openrocket/gui/util/SwingPreferences.java

@@ -43,7 +43,7 @@ public class SwingPreferences extends net.sf.openrocket.startup.Preferences {
 	private static final List<Locale> SUPPORTED_LOCALES;
 	static {
 		List<Locale> list = new ArrayList<Locale>();
-		for (String lang : new String[] { "en", "de", "es", "fr", "it", "nl", "ru", "cs", "pl", "ja", "pt", "tr" }) {
+		for (String lang : new String[] { "en", "ar", "de", "es", "fr", "it", "nl", "ru", "cs", "pl", "ja", "pt", "tr" }) {
 			list.add(new Locale(lang));
 		}
 		list.add(new Locale("zh", "CN"));