diff -Naur old/formatting.php new/formatting.php
--- old/formatting.php	2018-09-07 17:24:02.916711000 +0530
+++ new/formatting.php	2018-09-07 17:23:10.068207000 +0530
@@ -1729,7 +1729,24 @@
 		} elseif ( 'sr_RS' === $locale || 'bs_BA' === $locale ) {
 			$chars[ 'Đ' ] = 'DJ';
 			$chars[ 'đ' ] = 'dj';
-		}
+		} elseif ( 'el' == $locale ) {
+            $chars[ 'Ά' ] = 'Α';
+            $chars[ 'ά' ] = 'α';
+            $chars[ 'Έ' ] = 'Ε';
+            $chars[ 'έ' ] = 'ε';
+            $chars[ 'Ί' ] = 'Ι';
+            $chars[ 'ί' ] = 'ι';
+            $chars[ 'ΐ' ] = 'ϊ';
+            $chars[ 'Ύ' ] = 'Υ';
+            $chars[ 'ύ' ] = 'υ';
+            $chars[ 'ΰ' ] = 'ϋ';
+            $chars[ 'Ή' ] = 'Η';
+            $chars[ 'ή' ] = 'η';
+            $chars[ 'Ό' ] = 'Ο';
+            $chars[ 'ό' ] = 'ο';
+            $chars[ 'Ώ' ] = 'Ω';
+            $chars[ 'ώ' ] = 'ω';
+        }
 
 		$string = strtr($string, $chars);
 	} else {