Support i18n

Change-Id: I7e588542e2b7eb4b6fcaca6a2da7e2848a4eab5f
diff --git a/Changes b/Changes
index 8b72921..551cace 100755
--- a/Changes
+++ b/Changes
@@ -1,5 +1,6 @@
-0.1.1 2023-03-10
+0.1.1 2023-03-17
         - Add font faces with absolute paths.
+        - Add i18n.
 
 0.1.0 2023-03-07
         - Add gzip support
diff --git a/go.mod b/go.mod
index 088c129..8267b77 100644
--- a/go.mod
+++ b/go.mod
@@ -4,10 +4,12 @@
 
 require (
 	github.com/dgraph-io/badger/v3 v3.2103.5
+	github.com/gin-contrib/i18n v0.0.1
 	github.com/gin-gonic/gin v1.9.0
 	github.com/joho/godotenv v1.5.1
 	github.com/mattn/go-jsonpointer v0.0.1
 	github.com/stretchr/testify v1.8.2
+	golang.org/x/text v0.7.0
 )
 
 require (
@@ -36,6 +38,7 @@
 	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/nicksnyder/go-i18n/v2 v2.1.2 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
@@ -46,7 +49,6 @@
 	golang.org/x/crypto v0.6.0 // indirect
 	golang.org/x/net v0.7.0 // indirect
 	golang.org/x/sys v0.5.0 // indirect
-	golang.org/x/text v0.7.0 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 5250878..27e0077 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,5 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
@@ -38,15 +39,22 @@
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/gin-contrib/i18n v0.0.1 h1:G8alWQWdo7yboEA+bu5IMghNfa7dVpUYRLWJU6n7x18=
+github.com/gin-contrib/i18n v0.0.1/go.mod h1:DGuXswV137IIHGIjjIH2qtP+sJMteNbcWFH0WLikYss=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.7.4/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
 github.com/gin-gonic/gin v1.9.0 h1:OjyFBKICoexlu99ctXNR2gg+c5pKrKMuyjgARg9qeY8=
 github.com/gin-gonic/gin v1.9.0/go.mod h1:W1Me9+hsUSyj3CePGrd1/QrKJMSJ1Tu/0hFEH89961k=
+github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
 github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
 github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
 github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.4.1/go.mod h1:nlOn6nFhuKACm19sB/8EGNn9GlaMV7XkbRSipzJ0Ii4=
 github.com/go-playground/validator/v10 v10.11.2 h1:q3SHpufmypg+erIExEKUmsgmhDTyhcJ38oeKGACXohU=
 github.com/go-playground/validator/v10 v10.11.2/go.mod h1:NieE624vt4SCTJtD87arVLvdmjPAeV8BQlHtMnw9D7s=
 github.com/goccy/go-json v0.10.0 h1:mXKd9Qw4NuzShiRlOXKews24ufknHO7gx30lsDyokKA=
@@ -64,6 +72,7 @@
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
 github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
@@ -95,6 +104,7 @@
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
@@ -110,9 +120,11 @@
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgxpxOKII=
 github.com/leodido/go-urn v1.2.2 h1:7z68G0FCGvDk646jz1AelTYNYWrTNm0bEcFAo147wt4=
 github.com/leodido/go-urn v1.2.2/go.mod h1:kUaIbLZWttglzwNuG0pgsh5vuV6u2YcGBYz1hIPjtOQ=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
 github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
 github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-jsonpointer v0.0.1 h1:j5m5P9BdP4B/zn6J7oH3KIQSOa2OHmcNAKEozUW7wuE=
@@ -122,8 +134,11 @@
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
+github.com/nicksnyder/go-i18n/v2 v2.1.2 h1:QHYxcUJnGHBaq7XbvgunmZ2Pn0focXFqTD61CkH146c=
+github.com/nicksnyder/go-i18n/v2 v2.1.2/go.mod h1:d++QJC9ZVf7pa48qrsRWhMJ5pSHIPmS3OLqK1niyLxs=
 github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
 github.com/pelletier/go-toml/v2 v2.0.6 h1:nrzqCb7j9cDFj2coyLNLaZuJTLjWjlaz6nvTvIwycIU=
 github.com/pelletier/go-toml/v2 v2.0.6/go.mod h1:eumQOmlWiOPt5WriQQqoM5y18pDHwha2N+QD+EUNTek=
@@ -158,7 +173,9 @@
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
+github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
+github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 github.com/ugorji/go/codec v1.2.10 h1:eimT6Lsr+2lzmSZxPhLFoOWFmQqwk0fllJJ5hEbTXtQ=
 github.com/ugorji/go/codec v1.2.10/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
@@ -205,6 +222,7 @@
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -212,7 +230,9 @@
 golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -257,7 +277,11 @@
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/i18n/de.json b/i18n/de.json
new file mode 100644
index 0000000..bbccfd0
--- /dev/null
+++ b/i18n/de.json
@@ -0,0 +1,5 @@
+{
+  "fulltext": "Volltext",
+  "fromProvider": "Volltext angeboten durch",
+  "noAccess":"Es ist kein externer Anbieter bekannt. Ein Zugriff auf den Volltext ist daher nicht möglich."
+}
diff --git a/i18n/en.json b/i18n/en.json
new file mode 100644
index 0000000..8347bb5
--- /dev/null
+++ b/i18n/en.json
@@ -0,0 +1,5 @@
+{
+  "fulltext":"Full Text",
+  "fromProvider":"Full text provided by",
+  "noAccess":"External provider unknown. No access to full text available."
+}
diff --git a/service.go b/service.go
index ad6afaf..687c16a 100644
--- a/service.go
+++ b/service.go
@@ -11,9 +11,11 @@
 	"path/filepath"
 
 	badger "github.com/dgraph-io/badger/v3"
+	ginI18n "github.com/gin-contrib/i18n"
 	"github.com/gin-gonic/gin"
 	"github.com/joho/godotenv"
 	"github.com/mattn/go-jsonpointer"
+	"golang.org/x/text/language"
 )
 
 var db *badger.DB
@@ -116,7 +118,19 @@
 }
 
 func setupRouter() *gin.Engine {
+	gin.SetMode(gin.ReleaseMode)
+
 	r := gin.Default()
+
+	// apply i18n middleware
+	r.Use(ginI18n.Localize(ginI18n.WithBundle(&ginI18n.BundleCfg{
+		RootPath:         "./i18n",
+		AcceptLanguage:   []language.Tag{language.German, language.English},
+		DefaultLanguage:  language.English,
+		UnmarshalFunc:    json.Unmarshal,
+		FormatBundleFile: "json",
+	})))
+
 	r.LoadHTMLGlob("templates/*")
 
 	korapServer := os.Getenv("KORAP_SERVER")
@@ -163,7 +177,10 @@
 	// Return widget page
 	r.GET("/", func(c *gin.Context) {
 		c.HTML(http.StatusOK, "main.html", gin.H{
-			"korapServer": korapServer,
+			"korapServer":  korapServer,
+			"title":        ginI18n.MustGetMessage("fulltext"),
+			"noAccess":     ginI18n.MustGetMessage("noAccess"),
+			"fromProvider": ginI18n.MustGetMessage("fromProvider"),
 		})
 	})
 
@@ -180,8 +197,6 @@
 }
 
 func main() {
-	gin.SetMode(gin.ReleaseMode)
-
 	if godotenv.Load() != nil {
 		log.Println(".env file not loaded.")
 	}
@@ -215,6 +230,7 @@
 			log.Fatal("Unable to commit")
 		}
 	}
+
 	r := setupRouter()
 
 	port := os.Getenv("KORAP_EXTERNAL_RESOURCES_PORT")
diff --git a/service_test.go b/service_test.go
index 65fb8c5..9101080 100644
--- a/service_test.go
+++ b/service_test.go
@@ -61,7 +61,7 @@
 	assert.Equal(t, w.Header().Get("Access-Control-Allow-Credentials"), "null")
 	assert.Equal(t, w.Header().Get("Vary"), "Origin")
 	assert.Contains(t, w.Body.String(), "data-server=\"https://korap.ids-mannheim.de\"")
-	assert.Contains(t, w.Body.String(), "<title>External Resources</title>")
+	assert.Contains(t, w.Body.String(), "<title>Full Text</title>")
 
 	os.Setenv("KORAP_SERVER", "https://korap.ids-mannheim.de/instance/test")
 
@@ -74,7 +74,33 @@
 
 	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Contains(t, w.Body.String(), "data-server=\"https://korap.ids-mannheim.de/instance/test\"")
-	assert.Contains(t, w.Body.String(), "<title>External Resources</title>")
+	assert.Contains(t, w.Body.String(), "<title>Full Text</title>")
+}
+
+func TestWidgetRouteI18n(t *testing.T) {
+
+	router := setupRouter()
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/", nil)
+	req.Header.Set("Accept-Language", "de")
+
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Contains(t, w.Body.String(), "<title>Volltext</title>")
+	assert.Contains(t, w.Body.String(), "Volltext angeboten durch")
+	assert.Contains(t, w.Body.String(), "kein externer Anbieter bekannt")
+
+	req, _ = http.NewRequest(http.MethodGet, "/", nil)
+	req.Header.Set("Accept-Language", "pe")
+
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Contains(t, w.Body.String(), "<title>Full Text</title>")
+	assert.Contains(t, w.Body.String(), "Full text provided by")
+	assert.Contains(t, w.Body.String(), "External provider unknown. No access to full text available.")
 }
 
 func TestManifestRoute(t *testing.T) {
diff --git a/templates/main.html b/templates/main.html
index b298f6d..918badc 100644
--- a/templates/main.html
+++ b/templates/main.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <title>External Resources</title>
+    <title>{{ .title }}</title>
     <link href="https://korap.ids-mannheim.de/css/kalamar-plugin-latest.css" type="text/css" rel="stylesheet" />
     <script data-server="{{ .korapServer }}" src="https://korap.ids-mannheim.de/js/korap-plugin-latest.js"></script>
     <style><!--
@@ -15,7 +15,7 @@
 --></style>
   </head>
   <body>
-    <h1>Full Text</h1>
+    <h1>{{ .title }}</h1>
     <section style="background-color: #fefefe">
       <p id="buy">...</p>
     </section>
@@ -36,10 +36,10 @@
             var xhttp = new XMLHttpRequest();
             xhttp.onload = function() {
               if (this.status === 404) {
-                document.getElementById("buy").innerHTML = "External provider unknown. No full text available."
+                document.getElementById("buy").innerHTML = "{{ .noAccess }}}"
               } else {
                 var ret = this.responseText.split(",");
-                document.getElementById("buy").innerHTML = "You can access full text from <a target=\"_blank\" href=\"" + ret[1] + "\" class=\"external\">" + ret[0] + "</a>.";
+                document.getElementById("buy").innerHTML = "{{ .fromProvider }} <a target=\"_blank\" href=\"" + ret[1] + "\" class=\"external\">" + ret[0] + "</a>.";
               }
               P.resize();
             }