diff --git a/pkg/i18n/i18n_test.go b/pkg/i18n/i18n_test.go
new file mode 100644
index 000000000..3fec62456
--- /dev/null
+++ b/pkg/i18n/i18n_test.go
@@ -0,0 +1,86 @@
+package i18n
+
+import (
+	"os"
+	"testing"
+
+	"github.com/nicksnyder/go-i18n/v2/i18n"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewLocalizer(t *testing.T) {
+	type scenario struct {
+		setup    func()
+		test     func(*Localizer, error)
+		teardown func()
+	}
+
+	LCALL := os.Getenv("LC_ALL")
+	LANG := os.Getenv("LANG")
+
+	scenarios := []scenario{
+		{
+			func() {
+				os.Setenv("LC_ALL", "")
+				os.Setenv("LANG", "")
+			},
+			func(l *Localizer, err error) {
+				assert.EqualValues(t, "C", l.GetLanguage())
+			},
+			func() {
+				os.Setenv("LC_ALL", LCALL)
+				os.Setenv("LANG", LANG)
+			},
+		},
+		{
+			func() {
+				os.Setenv("LC_ALL", "whatever")
+				os.Setenv("LANG", "whatever")
+			},
+			func(l *Localizer, err error) {
+				assert.NoError(t, err)
+
+				assert.EqualValues(t, "whatever", l.GetLanguage())
+				assert.Equal(t, "Diff", l.Localize(&i18n.LocalizeConfig{
+					DefaultMessage: &i18n.Message{
+						ID: "DiffTitle",
+					},
+				}))
+				assert.Equal(t, "Diff", l.SLocalize("DiffTitle"))
+				assert.Equal(t, "Are you sure you want delete the branch test ?", l.TemplateLocalize("DeleteBranchMessage", Teml{"selectedBranchName": "test"}))
+			},
+			func() {
+				os.Setenv("LC_ALL", LCALL)
+				os.Setenv("LANG", LANG)
+			},
+		},
+		{
+			func() {
+				os.Setenv("LC_ALL", "nl")
+			},
+			func(l *Localizer, err error) {
+				assert.NoError(t, err)
+
+				assert.EqualValues(t, "nl", l.GetLanguage())
+				assert.Equal(t, "Diff", l.Localize(&i18n.LocalizeConfig{
+					DefaultMessage: &i18n.Message{
+						ID: "DiffTitle",
+					},
+				}))
+				assert.Equal(t, "Diff", l.SLocalize("DiffTitle"))
+				assert.Equal(t, "Weet je zeker dat je test branch wil verwijderen?", l.TemplateLocalize("DeleteBranchMessage", Teml{"selectedBranchName": "test"}))
+			},
+			func() {
+				os.Setenv("LC_ALL", LCALL)
+			},
+		},
+	}
+
+	for _, s := range scenarios {
+		s.setup()
+		s.test(NewLocalizer(logrus.New()))
+		s.teardown()
+	}
+}