diff --git a/ChimpKit3/ChimpKit.m b/ChimpKit3/ChimpKit.m
index ba98198..a4e8673 100644
--- a/ChimpKit3/ChimpKit.m
+++ b/ChimpKit3/ChimpKit.m
@@ -39,11 +39,11 @@ @implementation ChimpKit
 + (ChimpKit *)sharedKit {
 	static dispatch_once_t pred = 0;
 	__strong static ChimpKit *_sharedKit = nil;
-	
+
 	dispatch_once(&pred, ^{
 		_sharedKit = [[self alloc] init];
 	});
-	
+
 	return _sharedKit;
 }
 
@@ -52,7 +52,7 @@ - (id)init {
 		self.timeoutInterval = kDefaultTimeoutInterval;
 		self.requests = [[NSMutableDictionary alloc] init];
 	}
-	
+
 	return self;
 }
 
@@ -65,13 +65,13 @@ - (NSURLSession *)urlSession {
 													delegate:self
 											   delegateQueue:nil];
 	}
-	
+
 	return _urlSession;
 }
 
 - (void)setApiKey:(NSString *)apiKey {
 	_apiKey = apiKey;
-	
+
 	if (_apiKey) {
 		// Parse out the datacenter and template it into the URL.
 		NSArray *apiKeyParts = [_apiKey componentsSeparatedByString:@"-"];
@@ -94,7 +94,7 @@ - (NSUInteger)callApiMethod:(NSString *)aMethod withApiKey:(NSString *)anApiKey
 	if (aHandler == nil) {
 		return 0;
 	}
-    
+
 	return [self callApiMethod:aMethod withApiKey:anApiKey params:someParams andCompletionHandler:aHandler orDelegate:nil];
 }
 
@@ -106,28 +106,28 @@ - (NSUInteger)callApiMethod:(NSString *)aMethod withApiKey:(NSString *)anApiKey
 	if (aDelegate == nil) {
 		return 0;
 	}
-    
+
 	return [self callApiMethod:aMethod withApiKey:anApiKey params:someParams andCompletionHandler:nil orDelegate:aDelegate];
 }
 
 - (NSUInteger)callApiMethod:(NSString *)aMethod withApiKey:(NSString *)anApiKey params:(NSDictionary *)someParams andCompletionHandler:(ChimpKitRequestCompletionBlock)aHandler orDelegate:(id<ChimpKitRequestDelegate>)aDelegate {
 	if ((anApiKey == nil) && (self.apiKey == nil)) {
 		NSError *error = [NSError errorWithDomain:kErrorDomain code:kChimpKitErrorInvalidAPIKey userInfo:nil];
-		
+
 		if (aDelegate && [aDelegate respondsToSelector:@selector(ckRequestFailedWithIdentifier:andError:)]) {
 			[aDelegate ckRequestFailedWithIdentifier:0 andError:error];
 		}
-		
+
 		if (aHandler) {
 			aHandler(nil, nil, error);
 		}
-		
+
 		return 0;
 	}
-	
+
 	NSString *urlString = nil;
 	NSMutableDictionary *params = [NSMutableDictionary dictionaryWithDictionary:someParams];
-	
+
 	if (anApiKey) {
 		NSArray *apiKeyParts = [anApiKey componentsSeparatedByString:@"-"];
 		if ([apiKeyParts count] > 1) {
@@ -139,53 +139,58 @@ - (NSUInteger)callApiMethod:(NSString *)aMethod withApiKey:(NSString *)anApiKey
 			if (aDelegate && [aDelegate respondsToSelector:@selector(ckRequestFailedWithIdentifier:andError:)]) {
 				[aDelegate ckRequestFailedWithIdentifier:0 andError:error];
 			}
-            
+
             if (aHandler) {
                 aHandler(nil, nil, error);
             }
-			
+
 			return 0;
 		}
-		
+
 		[params setValue:anApiKey forKey:@"apikey"];
 	} else if (self.apiKey) {
 		urlString = [NSString stringWithFormat:@"%@%@", self.apiURL, aMethod];
 		[params setValue:self.apiKey forKey:@"apikey"];
 	}
-	
+
 	if (kCKDebug) NSLog(@"URL: %@", urlString);
-	
+
 	NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:urlString]
 																cachePolicy:NSURLRequestUseProtocolCachePolicy
 															timeoutInterval:self.timeoutInterval];
-	
+
 	[request setHTTPMethod:@"POST"];
 	[request setHTTPBody:[self encodeRequestParams:params]];
-	
+
+    if ([params valueForKey:@"language"]) {
+          [request addValue:[params valueForKey:@"language"]
+         forHTTPHeaderField:@"Accept-Language"];
+    }
+
 	NSURLSessionDataTask *dataTask = [self.urlSession dataTaskWithRequest:request];
-	
+
 	ChimpKitRequestWrapper *requestWrapper = [[ChimpKitRequestWrapper alloc] init];
-	
+
 	requestWrapper.dataTask = dataTask;
 	requestWrapper.delegate = aDelegate;
 	requestWrapper.completionHandler = aHandler;
-	
+
 	[dataTask resume];
-	
+
 	dispatch_async(dispatch_get_main_queue(), ^{
         [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
 	});
-	
+
 	[self.requests setObject:requestWrapper forKey:[NSNumber numberWithUnsignedInteger:[dataTask taskIdentifier]]];
-	
+
 	return [dataTask taskIdentifier];
 }
 
 - (void)cancelRequestWithIdentifier:(NSUInteger)identifier {
 	ChimpKitRequestWrapper *requestWrapper = [self.requests objectForKey:[NSNumber numberWithUnsignedInteger:identifier]];
-	
+
 	[requestWrapper.dataTask cancel];
-	
+
 	[self.requests removeObjectForKey:[NSNumber numberWithUnsignedInteger:identifier]];
 }
 
@@ -194,7 +199,7 @@ - (void)cancelRequestWithIdentifier:(NSUInteger)identifier {
 
 - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend {
 	ChimpKitRequestWrapper *requestWrapper = [self.requests objectForKey:[NSNumber numberWithUnsignedInteger:[task taskIdentifier]]];
-	
+
 	if (requestWrapper.delegate && [requestWrapper.delegate respondsToSelector:@selector(ckRequestIdentifier:didUploadBytes:outOfBytes:)]) {
 		[requestWrapper.delegate ckRequestIdentifier:[task  taskIdentifier]
 									  didUploadBytes:totalBytesSent
@@ -211,9 +216,9 @@ - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didComp
 	dispatch_async(dispatch_get_main_queue(), ^{
         [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
 	});
-	
+
 	ChimpKitRequestWrapper *requestWrapper = [self.requests objectForKey:[NSNumber numberWithUnsignedInteger:[task taskIdentifier]]];
-	
+
 	if (requestWrapper.completionHandler) {
 		requestWrapper.completionHandler(task.response, requestWrapper.receivedData, error);
 	} else {
@@ -230,7 +235,7 @@ - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didComp
 			}
 		}
 	}
-	
+
 	[self.requests removeObjectForKey:[NSNumber numberWithUnsignedInteger:[task taskIdentifier]]];
 }
 
@@ -240,9 +245,9 @@ - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didComp
 - (NSMutableData *)encodeRequestParams:(NSDictionary *)params {
     NSData *jsonData = [NSJSONSerialization dataWithJSONObject:params options:0 error:nil];
     NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
-    
+
     NSMutableData *postData = [NSMutableData dataWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding]];
-	
+
     return postData;
 }
 
@@ -256,7 +261,7 @@ - (id)init {
 	if (self = [super init]) {
 		self.receivedData = [[NSMutableData alloc] init];
 	}
-	
+
 	return self;
 }