diff --git a/lib/Viewer.js b/lib/Viewer.js
index 541d2d15..cf2497e1 100644
--- a/lib/Viewer.js
+++ b/lib/Viewer.js
@@ -326,7 +326,7 @@ Viewer.prototype.open = function(bpmnDiagramOrId, done) {
  * You can use these events to hook into the life-cycle.
  *
  * @param {Object} [options] export options
- * @param {Boolean} [options.format=false] output formated XML
+ * @param {Boolean} [options.format=false] output formatted XML
  * @param {Boolean} [options.preamble=true] output preamble
  *
  * @param {Function} done invoked with (err, xml)
diff --git a/lib/features/auto-place/AutoPlaceUtil.js b/lib/features/auto-place/AutoPlaceUtil.js
index 58db28e2..afa8797e 100644
--- a/lib/features/auto-place/AutoPlaceUtil.js
+++ b/lib/features/auto-place/AutoPlaceUtil.js
@@ -335,7 +335,7 @@ export function getConnectedAtPosition(source, position, element) {
  * by some element connected to source.
  *
  * Take into account the escapeDirection (where to move
- * on positining clashes) in the computation.
+ * on positioning clashes) in the computation.
  *
  * @param {djs.model.Shape} source
  * @param {djs.model.Shape} element
diff --git a/lib/features/copy-paste/ModdleCopy.js b/lib/features/copy-paste/ModdleCopy.js
index 748e4585..2e77a97d 100644
--- a/lib/features/copy-paste/ModdleCopy.js
+++ b/lib/features/copy-paste/ModdleCopy.js
@@ -82,7 +82,7 @@ export default function ModdleCopy(eventBus, bpmnFactory, moddle) {
     });
   });
 
-  // default check wether property can be copied
+  // default check whether property can be copied
   eventBus.on('moddleCopy.canCopyProperty', function(context) {
     var parent = context.parent,
         parentDescriptor = isObject(parent) && parent.$descriptor,
diff --git a/lib/features/grid-snapping/behavior/LayoutConnectionBehavior.js b/lib/features/grid-snapping/behavior/LayoutConnectionBehavior.js
index 7c357c50..9c584a7e 100644
--- a/lib/features/grid-snapping/behavior/LayoutConnectionBehavior.js
+++ b/lib/features/grid-snapping/behavior/LayoutConnectionBehavior.js
@@ -78,7 +78,7 @@ LayoutConnectionBehavior.prototype.snapMiddleSegments = function(waypoints) {
 // helpers //////////
 
 /**
- * Check wether a connection has a middle segments.
+ * Check whether a connection has a middle segments.
  *
  * @param {Array} waypoints
  *
@@ -89,7 +89,7 @@ function hasMiddleSegments(waypoints) {
 }
 
 /**
- * Check wether an alignment is horizontal.
+ * Check whether an alignment is horizontal.
  *
  * @param {string} aligned
  *
@@ -100,7 +100,7 @@ function horizontallyAligned(aligned) {
 }
 
 /**
- * Check wether an alignment is vertical.
+ * Check whether an alignment is vertical.
  *
  * @param {string} aligned
  *
diff --git a/lib/features/modeling/BpmnUpdater.js b/lib/features/modeling/BpmnUpdater.js
index feb97275..ed71d5de 100644
--- a/lib/features/modeling/BpmnUpdater.js
+++ b/lib/features/modeling/BpmnUpdater.js
@@ -317,7 +317,7 @@ BpmnUpdater.prototype.updateParent = function(element, oldParent) {
     return;
   }
 
-  // data stores in collaborations are handled seperately by DataStoreBehavior
+  // data stores in collaborations are handled separately by DataStoreBehavior
   if (is(element, 'bpmn:DataStoreReference') &&
       element.parent &&
       is(element.parent, 'bpmn:Collaboration')) {
diff --git a/lib/features/modeling/behavior/ToggleElementCollapseBehaviour.js b/lib/features/modeling/behavior/ToggleElementCollapseBehaviour.js
index 3e988d0f..d533272f 100644
--- a/lib/features/modeling/behavior/ToggleElementCollapseBehaviour.js
+++ b/lib/features/modeling/behavior/ToggleElementCollapseBehaviour.js
@@ -22,7 +22,7 @@ export default function ToggleElementCollapseBehaviour(
   CommandInterceptor.call(this, eventBus);
 
 
-  function hideEmptyLables(children) {
+  function hideEmptyLabels(children) {
     if (children.length) {
       children.forEach(function(child) {
         if (child.type === 'label' && !child.businessObject.name) {
@@ -82,7 +82,7 @@ export default function ToggleElementCollapseBehaviour(
     if (!shape.collapsed) {
 
       // all children got made visible through djs, hide empty labels
-      hideEmptyLables(shape.children);
+      hideEmptyLabels(shape.children);
 
       // remove collapsed marker
       getBusinessObject(shape).di.isExpanded = true;
diff --git a/lib/features/modeling/behavior/util/GeometricUtil.js b/lib/features/modeling/behavior/util/GeometricUtil.js
index e7d8b650..96033aed 100644
--- a/lib/features/modeling/behavior/util/GeometricUtil.js
+++ b/lib/features/modeling/behavior/util/GeometricUtil.js
@@ -67,7 +67,7 @@ function solveLambaSystem(a, b, c) {
  * Position of perpendicular foot
  *
  * @param {Point}
- * @param [ {Point}, {Point} ] line defined throug two points
+ * @param [ {Point}, {Point} ] line defined through two points
  * @return {Point} the perpendicular foot position
  */
 export function perpendicularFoot(point, line) {
@@ -88,7 +88,7 @@ export function perpendicularFoot(point, line) {
  * Calculates the distance between a point and a line
  *
  * @param {Point}
- * @param [ {Point}, {Point} ] line defined throug two points
+ * @param [ {Point}, {Point} ] line defined through two points
  * @return {Float} distance
  */
 export function getDistancePointLine(point, line) {
diff --git a/lib/features/modeling/behavior/util/LabelLayoutUtil.js b/lib/features/modeling/behavior/util/LabelLayoutUtil.js
index d99200a5..43a50a07 100644
--- a/lib/features/modeling/behavior/util/LabelLayoutUtil.js
+++ b/lib/features/modeling/behavior/util/LabelLayoutUtil.js
@@ -19,7 +19,7 @@ export function findNewLabelLineStartIndex(oldWaypoints, newWaypoints, attachmen
 
   var offset = newWaypoints.length - oldWaypoints.length;
 
-  // segmentMove happend
+  // segmentMove happened
   if (hints.segmentMove) {
 
     var oldSegmentStartIndex = hints.segmentMove.segmentStartIndex,
@@ -39,7 +39,7 @@ export function findNewLabelLineStartIndex(oldWaypoints, newWaypoints, attachmen
     return index;
   }
 
-  // bendpointMove happend
+  // bendpointMove happened
   if (hints.bendpointMove) {
 
     var insert = hints.bendpointMove.insert,
@@ -141,7 +141,7 @@ export function getLabelAdjustment(label, newWaypoints, oldWaypoints, hints) {
         oldBendpointIndex = attachment.bendpointIndex,
         oldBendpoint = oldWaypoints[oldBendpointIndex];
 
-    // bendpoint position hasnt changed, return same position
+    // bendpoint position hasn't changed, return same position
     if (newWaypoints.indexOf(oldBendpoint) !== -1) {
       return { x: x, y: y };
     }
diff --git a/lib/features/modeling/behavior/util/LineAttachmentUtil.js b/lib/features/modeling/behavior/util/LineAttachmentUtil.js
index 251543c6..ac6acc69 100644
--- a/lib/features/modeling/behavior/util/LineAttachmentUtil.js
+++ b/lib/features/modeling/behavior/util/LineAttachmentUtil.js
@@ -194,7 +194,7 @@ function isPointInSegment(p, segmentStart, segmentEnd) {
 function fenced(n, rangeStart, rangeEnd) {
 
   // use matching threshold to work around
-  // precisison errors in intersection computation
+  // precision errors in intersection computation
 
   return (
     n >= min(rangeStart, rangeEnd) - EQUAL_THRESHOLD &&
diff --git a/lib/features/modeling/cmd/SplitLaneHandler.js b/lib/features/modeling/cmd/SplitLaneHandler.js
index fa6fcb98..aafa55c3 100644
--- a/lib/features/modeling/cmd/SplitLaneHandler.js
+++ b/lib/features/modeling/cmd/SplitLaneHandler.js
@@ -6,7 +6,7 @@ import {
 
 /**
  * A handler that splits a lane into a number of sub-lanes,
- * creating new sub lanes, if neccessary.
+ * creating new sub lanes, if necessary.
  *
  * @param {Modeling} modeling
  */
diff --git a/lib/features/modeling/cmd/UpdatePropertiesHandler.js b/lib/features/modeling/cmd/UpdatePropertiesHandler.js
index 19cb3d8e..b9d35535 100644
--- a/lib/features/modeling/cmd/UpdatePropertiesHandler.js
+++ b/lib/features/modeling/cmd/UpdatePropertiesHandler.js
@@ -166,7 +166,7 @@ function getProperties(businessObject, properties) {
 
   return reduce(propertyNames, function(result, key) {
 
-    // handle DI seperately
+    // handle DI separately
     if (key !== DI) {
       result[key] = businessObject.get(key);
     } else {
diff --git a/lib/features/rules/BpmnRules.js b/lib/features/rules/BpmnRules.js
index 59764553..fbfc1abe 100644
--- a/lib/features/rules/BpmnRules.js
+++ b/lib/features/rules/BpmnRules.js
@@ -672,7 +672,7 @@ function canReplace(elements, target, position) {
           });
         }
 
-        // replace an error/escalation/compansate start event by a blank interrupting start event
+        // replace an error/escalation/compensate start event by a blank interrupting start event
         // when the target is not an event sub process
         if (hasErrorEventDefinition(element) ||
             hasEscalationEventDefinition(element) ||
diff --git a/lib/import/BpmnImporter.js b/lib/import/BpmnImporter.js
index 07938fd5..6dafd7ee 100644
--- a/lib/import/BpmnImporter.js
+++ b/lib/import/BpmnImporter.js
@@ -140,7 +140,7 @@ BpmnImporter.prototype.add = function(semantic, parentElement) {
 
     if (is(semantic, 'bpmn:DataStoreReference')) {
 
-      // check wether data store is inside our outside of its semantic parent
+      // check whether data store is inside our outside of its semantic parent
       if (!isPointInsideBBox(parentElement, getMid(bounds))) {
         parentElement = this._canvas.getRootElement();
       }