diff --git a/web/handlers/admin/set_language_test.go b/web/handlers/admin/set_language_test.go
new file mode 100644
index 0000000..41b283f
--- /dev/null
+++ b/web/handlers/admin/set_language_test.go
@@ -0,0 +1,45 @@
+package admin
+
+import (
+	"net/http"
+  "strings"
+	"testing"
+
+	"github.com/ssb-ngi-pointer/go-ssb-room/web/router"
+	"github.com/stretchr/testify/assert"
+)
+
+
+/* can't test English atm due to web/i18n/i18ntesting/testing.go:justTheKeys, which generates translations that are just
+* translationLabel = "translationLabel"
+*/
+// func TestLanguageSetDefaultLanguageEnglish(t *testing.T) {
+// 	ts := newSession(t)
+// 	a := assert.New(t)
+//
+// 	ts.ConfigDB.GetDefaultLanguageReturns("en", nil)
+//
+// 	u := ts.URLTo(router.AdminSettings)
+// 	html, resp := ts.Client.GetHTML(u)
+// 	a.Equal(http.StatusOK, resp.Code, "Wrong HTTP status code")
+//
+//   fmt.Println(html.Html())
+// 	summaryElement := html.Find("#language-summary")
+//   summaryText := strings.TrimSpace(summaryElement.Text())
+//   a.Equal("English", summaryText, "summary language should display english translation of language name")
+// }
+
+func TestLanguageSetDefaultLanguage(t *testing.T) {
+	ts := newSession(t)
+	a := assert.New(t)
+
+	ts.ConfigDB.GetDefaultLanguageReturns("de", nil)
+
+	u := ts.URLTo(router.AdminSettings)
+	html, resp := ts.Client.GetHTML(u)
+	a.Equal(http.StatusOK, resp.Code, "Wrong HTTP status code")
+
+	summaryElement := html.Find("#language-summary")
+  summaryText := strings.TrimSpace(summaryElement.Text())
+  a.Equal("Deutsch", summaryText, "summary language should display german translation of language name")
+}
diff --git a/web/handlers/set_language_test.go b/web/handlers/set_language_test.go
new file mode 100644
index 0000000..ea20502
--- /dev/null
+++ b/web/handlers/set_language_test.go
@@ -0,0 +1,84 @@
+package handlers
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	// "github.com/ssb-ngi-pointer/go-ssb-room/roomdb"
+	"github.com/ssb-ngi-pointer/go-ssb-room/web/i18n"
+	"github.com/ssb-ngi-pointer/go-ssb-room/web/router"
+)
+
+func TestLanguageDefaultNoCookie(t *testing.T) {
+	ts := setup(t)
+	a := assert.New(t)
+	route := ts.URLTo(router.CompleteIndex)
+	postEndpoint := ts.URLTo(router.CompleteSetLanguage)
+	formAction := postEndpoint.Path
+
+	html, res := ts.Client.GetHTML(route)
+	a.Equal(http.StatusOK, res.Code, "wrong HTTP status code")
+
+	languageForms := html.Find(fmt.Sprintf(`form[action="%s"]`, formAction))
+	// two languages: english, deutsch => two <form> elements
+	a.Equal(2, languageForms.Length())
+
+	// verify there is no language cookie to set yet
+	cookieHeader := res.Header()["Set-Cookie"]
+	for _, cookie := range cookieHeader {
+		cookieName := strings.Split(cookie, "=")[0]
+		a.NotEqual(cookieName, i18n.LanguageCookieName)
+	}
+}
+
+func TestLanguageChooseGerman(t *testing.T) {
+	ts := setup(t)
+	a := assert.New(t)
+	route := ts.URLTo(router.CompleteIndex)
+	postEndpoint := ts.URLTo(router.CompleteSetLanguage)
+	formAction := postEndpoint.Path
+
+	html, res := ts.Client.GetHTML(route)
+	a.Equal(http.StatusOK, res.Code, "wrong HTTP status code")
+
+	csrfTokenElem := html.Find(fmt.Sprintf(`form[action="%s"] input[type="hidden"]`, formAction))
+	a.Equal(6, csrfTokenElem.Length())
+
+	csrfName, has := csrfTokenElem.First().Attr("name")
+	a.True(has, "should have a name attribute")
+
+	csrfValue, has := csrfTokenElem.First().Attr("value")
+	a.True(has, "should have value attribute")
+
+	// construct the post request fields, simulating picking a language
+	setLanguageFields := url.Values{
+		"lang":   []string{"de"},
+		"page":   []string{"/"},
+		csrfName: []string{csrfValue},
+	}
+
+	// set the referer header (important! otherwise our nicely crafted request yields a 500 :'()
+	var refererHeader = make(http.Header)
+	refererHeader.Set("Referer", "https://localhost")
+	ts.Client.SetHeaders(refererHeader)
+
+	// send the post request
+	postRes := ts.Client.PostForm(postEndpoint, setLanguageFields)
+	a.Equal(http.StatusSeeOther, postRes.Code, "wrong HTTP status code for sign in")
+
+	// verify there is one language cookie to set
+	cookieHeader := postRes.Header()["Set-Cookie"]
+	var languageCookies int
+	for _, cookie := range cookieHeader {
+		cookieName := strings.Split(cookie, "=")[0]
+		if cookieName == i18n.LanguageCookieName {
+			languageCookies += 1
+		}
+	}
+	a.Equal(1, languageCookies, "should have one language cookie set after posting")
+}
diff --git a/web/templates/admin/settings.tmpl b/web/templates/admin/settings.tmpl
index f2100a8..3fb1171 100644
--- a/web/templates/admin/settings.tmpl
+++ b/web/templates/admin/settings.tmpl
@@ -60,7 +60,7 @@
     </p>
   <h3 class="text-gray-400 text-sm font-bold mb-2">{{ i18n "SetDefaultLanguageTitle" }}</h3>
   <details class="mb-8 self-start max-w-sm">
-    <summary class="px-3 py-1 max-w-sm rounded shadow bg-white ring-1 ring-gray-300 hover:bg-gray-100 cursor-pointer">
+    <summary id="language-summary" class="px-3 py-1 max-w-sm rounded shadow bg-white ring-1 ring-gray-300 hover:bg-gray-100 cursor-pointer">
     {{ $.CurrentLanguage }}
     </summary>
     <div class="mt-2 bg-gray bg-white px-3 rounded ring-1 ring-gray-300">