diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1be96bf1796..aa969aed972 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -76,7 +76,7 @@ To lint the JavaScript, HTML, and CSS, as well as run a smoke test in PhantomJS,
 $ grunt
 ```
 
-To run the tests for a specific plugin in your browser, open the approriate file from the `/tests/unit/` directory, for example: `http://localhost/tests/unit/accordion/accordion.html`. The domain will be dependent on your local server configuation; if there is a port, be sure to include it.
+To run the tests for a specific plugin in your browser, open the approriate file from the `/tests/unit/` directory, for example: `http://localhost/tests/unit/accordion/accordion.html`. The domain will be dependent on your local server configuration; if there is a port, be sure to include it.
 
 Ideally you would test in all of our [supported browsers](http://jqueryui.com/browser-support/), but if you don't have all of these browsers available, that's ok.
 
diff --git a/external/globalize.js b/external/globalize.js
index a38a32625d3..73222ad2f7f 100644
--- a/external/globalize.js
+++ b/external/globalize.js
@@ -1481,7 +1481,7 @@ Globalize.parseFloat = function( value, radix, cultureSelector ) {
 	if ( value.indexOf(culture.numberFormat.currency.symbol) > -1 ) {
 		// remove currency symbol
 		value = value.replace( culture.numberFormat.currency.symbol, "" );
-		// replace decimal seperator
+		// replace decimal separator
 		value = value.replace( culture.numberFormat.currency["."], culture.numberFormat["."] );
 	}
 
diff --git a/tests/jquery-1.6.1.js b/tests/jquery-1.6.1.js
index 33e87732dc0..4cb7990a9e5 100644
--- a/tests/jquery-1.6.1.js
+++ b/tests/jquery-1.6.1.js
@@ -2000,7 +2000,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/tests/jquery-1.6.2.js b/tests/jquery-1.6.2.js
index fc5a1d74d3e..6c1ac648f4f 100644
--- a/tests/jquery-1.6.2.js
+++ b/tests/jquery-1.6.2.js
@@ -2029,7 +2029,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/tests/jquery-1.6.3.js b/tests/jquery-1.6.3.js
index f69fd06b0a8..cf62edff61a 100644
--- a/tests/jquery-1.6.3.js
+++ b/tests/jquery-1.6.3.js
@@ -2067,7 +2067,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/tests/jquery-1.6.4.js b/tests/jquery-1.6.4.js
index 5ccaf5b8ee8..0d8005cb381 100644
--- a/tests/jquery-1.6.4.js
+++ b/tests/jquery-1.6.4.js
@@ -2068,7 +2068,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/tests/jquery-1.6.js b/tests/jquery-1.6.js
index 61091a7e7c7..d37ca1d4f54 100644
--- a/tests/jquery-1.6.js
+++ b/tests/jquery-1.6.js
@@ -1997,7 +1997,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/tests/jquery-1.7.1.js b/tests/jquery-1.7.1.js
index c8e7d7a010a..2521163e1ce 100644
--- a/tests/jquery-1.7.1.js
+++ b/tests/jquery-1.7.1.js
@@ -2278,7 +2278,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/tests/jquery-1.7.2.js b/tests/jquery-1.7.2.js
index ceb681ff9f8..6191a6637ad 100644
--- a/tests/jquery-1.7.2.js
+++ b/tests/jquery-1.7.2.js
@@ -2338,7 +2338,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/tests/jquery-1.7.js b/tests/jquery-1.7.js
index 3c9ea9e5649..f40388ac95d 100644
--- a/tests/jquery-1.7.js
+++ b/tests/jquery-1.7.js
@@ -2329,7 +2329,7 @@ jQuery.fn.extend({
 					classNames = value.split( rspace );
 
 				while ( (className = classNames[ i++ ]) ) {
-					// check each className given, space seperated list
+					// check each className given, space separated list
 					state = isBool ? state : !self.hasClass( className );
 					self[ state ? "addClass" : "removeClass" ]( className );
 				}
diff --git a/ui/sortable.js b/ui/sortable.js
index a518e75cf44..c7edd3d1fd6 100644
--- a/ui/sortable.js
+++ b/ui/sortable.js
@@ -391,7 +391,7 @@ return $.widget("ui.sortable", $.ui.mouse, {
 			// currentContainer is switched before the placeholder is moved.
 			//
 			// Without this, moving items in "sub-sortables" can cause
-			// the placeholder to jitter beetween the outer and inner container.
+			// the placeholder to jitter between the outer and inner container.
 			if (item.instance !== this.currentContainer) {
 				continue;
 			}