diff --git a/localization.go b/localization.go
index 7386f0e..aa4bdb1 100644
--- a/localization.go
+++ b/localization.go
@@ -2,6 +2,7 @@ package webutility
 
 import (
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 	"path"
@@ -17,12 +18,10 @@ type Dictionary struct {
 	defaultLocale string
 }
 
-func NewDictionary(def string) *Dictionary {
-	d := Dictionary{
+func NewDictionary() *Dictionary {
+	return &Dictionary{
 		locales: map[string]map[string]string{},
 	}
-	d.defaultLocale = def
-	return &d
 }
 
 func (d *Dictionary) AddTranslations(directory string) error {
@@ -58,10 +57,8 @@ func (d *Dictionary) AddTranslations(directory string) error {
 		d.supported = append(d.supported, loc)
 	}
 
-	if d.defaultLocale == "" {
-		if len(d.supported) > 0 {
-			d.defaultLocale = d.supported[0]
-		}
+	if d.defaultLocale == "" && len(d.supported) > 0 {
+		d.defaultLocale = d.supported[0]
 	}
 
 	return nil
@@ -88,7 +85,17 @@ func (d *Dictionary) Translate(loc, key string) string {
 	return d.locales[loc][key]
 }
 
-func (d *Dictionary) hasLocale(loc string) bool {
+func (d *Dictionary) SetDefaultLocale(loc string) error {
+	if !d.contains(loc) {
+		return fmt.Errorf("locale file not loaded: %s", loc)
+	}
+
+	d.defaultLocale = loc
+
+	return nil
+}
+
+func (d *Dictionary) contains(loc string) bool {
 	for _, v := range d.supported {
 		if v == loc {
 			return true