diff --git a/core/router/api_builder.go b/core/router/api_builder.go
index 5858df2d..475b68d7 100644
--- a/core/router/api_builder.go
+++ b/core/router/api_builder.go
@@ -225,8 +225,10 @@ func (api *APIBuilder) HandleMany(methodOrMulti string, relativePathorMulti stri
 	return
 }
 
-// Party is just a group joiner of routes which have the same prefix and share same middleware(s) also.
-// Party could also be named as 'Join' or 'Node' or 'Group' , Party chosen because it is fun.
+// Party groups routes which may have the same prefix and share same handlers,
+// returns that new rich subrouter.
+//
+// You can even declare a subdomain with relativePath as "mysub." or see `Subdomain`.
 func (api *APIBuilder) Party(relativePath string, handlers ...context.Handler) Party {
 	parentPath := api.relativePath
 	dot := string(SubdomainPrefix[0])
diff --git a/core/router/party.go b/core/router/party.go
index 86ea1d1a..16834468 100644
--- a/core/router/party.go
+++ b/core/router/party.go
@@ -13,7 +13,10 @@ import (
 //
 // Look the "APIBuilder" for its implementation.
 type Party interface {
-	// Party creates and returns a new child Party with the following features.
+	// Party groups routes which may have the same prefix and share same handlers,
+	// returns that new rich subrouter.
+	//
+	// You can even declare a subdomain with relativePath as "mysub." or see `Subdomain`.
 	Party(relativePath string, middleware ...context.Handler) Party
 	// PartyFunc same as `Party`, groups routes that share a base path or/and same handlers.
 	// However this function accepts a function that receives this created Party instead.
diff --git a/middleware/i18n/i18n.go b/middleware/i18n/i18n.go
index 6e5a9dd7..4fef4470 100644
--- a/middleware/i18n/i18n.go
+++ b/middleware/i18n/i18n.go
@@ -22,7 +22,8 @@ func (i *i18nMiddleware) ServeHTTP(ctx context.Context) {
 	language := i.config.Default
 
 	langKey := ctx.Application().ConfigurationReadOnly().GetTranslateLanguageContextKey()
-	if ctx.Values().GetString(langKey) == "" {
+	language = ctx.Values().GetString(langKey)
+	if language == "" {
 		// try to get by url parameter
 		language = ctx.URLParam(i.config.URLParameter)
 		if language == "" {
@@ -52,8 +53,9 @@ func (i *i18nMiddleware) ServeHTTP(ctx context.Context) {
 		if language == "" {
 			language = i.config.Default
 		}
-	}
 
+		ctx.Values().Set(langKey, language)
+	}
 	locale := i18n.Locale{Lang: language}
 
 	// if unexpected language given, the middleware will  transtlate to the default language, the language key should be
@@ -61,7 +63,7 @@ func (i *i18nMiddleware) ServeHTTP(ctx context.Context) {
 	if indexLang := locale.Index(); indexLang == -1 {
 		locale.Lang = i.config.Default
 	}
-	ctx.Values().Set(langKey, locale.Lang)
+
 	translateFuncKey := ctx.Application().ConfigurationReadOnly().GetTranslateFunctionContextKey()
 	ctx.Values().Set(translateFuncKey, locale.Tr)
 	ctx.Next()
@@ -82,16 +84,23 @@ func New(c Config) context.Handler {
 	i := &i18nMiddleware{config: c}
 	firstlanguage := ""
 	//load the files
-	for k, v := range c.Languages {
-		if !strings.HasSuffix(v, ".ini") {
-			v += ".ini"
-		}
-		err := i18n.SetMessage(k, v)
-		if err != nil && err != i18n.ErrLangAlreadyExist {
-			panic("iris i18n Middleware: Failed to set locale file" + k + " Error:" + err.Error())
-		}
-		if firstlanguage == "" {
-			firstlanguage = k
+	for k, langFileOrFiles := range c.Languages {
+		// remove all spaces.
+		langFileOrFiles = strings.Replace(langFileOrFiles, " ", "", -1)
+		// note: if only one, then the first element is the "v".
+		languages := strings.Split(langFileOrFiles, ",")
+
+		for _, v := range languages { // loop each of the files separated by comma, if any.
+			if !strings.HasSuffix(v, ".ini") {
+				v += ".ini"
+			}
+			err := i18n.SetMessage(k, v)
+			if err != nil && err != i18n.ErrLangAlreadyExist {
+				panic("Failed to set locale file'" + k + "' Error:" + err.Error())
+			}
+			if firstlanguage == "" {
+				firstlanguage = k
+			}
 		}
 	}
 	// if not default language setted then set to the first of the i.config.Languages