diff --git a/libsrc/avi/src/org/monte/media/riff/RIFFParser.java b/libsrc/avi/src/org/monte/media/riff/RIFFParser.java
index d0b95a1fd..fdda2c8ef 100644
--- a/libsrc/avi/src/org/monte/media/riff/RIFFParser.java
+++ b/libsrc/avi/src/org/monte/media/riff/RIFFParser.java
@@ -133,7 +133,7 @@ import javax.imageio.stream.ImageInputStream;
  * before starting the interpreter.
  * <p>
  * Once at least one chunk has been declared, the interpreter will only call the
- * visitor for occurences of the declared group chunks and data chunks. The property
+ * visitor for occurrences of the declared group chunks and data chunks. The property
  * chunks and the collection chunks can be obtained from the current group chunk
  * by calling #getProperty or #getCollection.
  * <br>Note: All information the visitor can obtain during interpretation is only
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
index 41de3188e..dca81aab6 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java
@@ -5261,7 +5261,7 @@ public final class SWF implements SWFContainerItem, Timelined, Openable {
 
     /**
      * Sorts character ids. Order of character ids will match the first
-     * occurence of the characters.
+     * occurrence of the characters.
      */
     public void sortCharacterIds() {
         int maxId = Math.max(tags.size(), getNextCharacterId());
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java
index 1b70dfbeb..60511a3ea 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/xfl/XFLConverter.java
@@ -1491,7 +1491,7 @@ public class XFLConverter {
 
         for (CharacterTag symbol : characters) {
             if ((symbol instanceof ShapeTag) && nonLibraryShapes.contains(symbol)) {
-                continue; //shapes with 1 ocurrence and single layer are not added to library
+                continue; //shapes with 1 occurrence and single layer are not added to library
             }
 
             if ((symbol instanceof ShapeTag) || (symbol instanceof DefineSpriteTag) || (symbol instanceof ButtonTag)) {
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/Graph.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/Graph.java
index 72f11c366..d0f17df3c 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/Graph.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/Graph.java
@@ -177,7 +177,7 @@ public class Graph {
      * input edges are already visited (not counting back edges), then all its
      * output edges are processed.
      * <p>
-     * This time is useful when sorting nodes according their occurence in
+     * This time is useful when sorting nodes according their occurrence in
      * getMostCommonPart method - used for switch detection
      *
      * @param loops Already calculated loops to get backedges from.