diff --git a/web/src/main/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2Controller.java b/web/src/main/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2Controller.java
index be753294..0ee09642 100644
--- a/web/src/main/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2Controller.java
+++ b/web/src/main/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2Controller.java
@@ -81,7 +81,7 @@ public URI billingToken(@ApiParam("${swagger.dashboard.institutions.model.id}")
         log.debug("billing exchange institutionId = {}", Encode.forJava(institutionId));
         log.info("env parameter: {}", Encode.forJava(environment.orElse("")));
 
-        final ExchangedToken exchangedToken = exchangeTokenService.retrieveBillingExchangedToken(institutionId, lang);
+        final ExchangedToken exchangedToken = exchangeTokenService.retrieveBillingExchangedToken(institutionId);
         final URI location = URI.create(exchangedToken.getBackOfficeUrl().replace("<IdentityToken>", exchangedToken.getIdentityToken()));
         log.debug(LogUtils.CONFIDENTIAL_MARKER, "billing exchange result = {}", Encode.forJava(String.valueOf(location)));
         log.trace("billing exchange end");
diff --git a/web/src/main/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2.java b/web/src/main/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2.java
index 1f8c4b7e..3f3bd8c2 100644
--- a/web/src/main/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2.java
+++ b/web/src/main/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2.java
@@ -134,7 +134,7 @@ public ExchangedToken exchange(String institutionId, String productId, Optional<
         return new ExchangedToken(jwts, urlBO);
     }
 
-    public ExchangedToken retrieveBillingExchangedToken(String institutionId, String lang) {
+    public ExchangedToken retrieveBillingExchangedToken(String institutionId) {
         Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
         if (authentication == null || authentication.getPrincipal() == null || authentication.getCredentials() == null) {
             throw new IllegalStateException("Authentication is required");
@@ -165,9 +165,8 @@ public ExchangedToken retrieveBillingExchangedToken(String institutionId, String
         String jwts = createJwts(claims);
         log.debug(LogUtils.CONFIDENTIAL_MARKER, "Exchanged token = {}", jwts);
         log.trace("exchange end");
-        final String billingUrlLang = Objects.nonNull(lang) ? billingUrl.concat("?lang=" + lang) : billingUrl;
 
-        return new ExchangedToken(jwts, billingUrlLang);
+        return new ExchangedToken(jwts, billingUrl);
     }
 
     private List<String> retrieveInvoiceableProductList() {
diff --git a/web/src/test/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2ControllerTest.java b/web/src/test/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2ControllerTest.java
index c9722571..ad5d7950 100644
--- a/web/src/test/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2ControllerTest.java
+++ b/web/src/test/java/it/pagopa/selfcare/dashboard/web/controller/TokenV2ControllerTest.java
@@ -92,7 +92,7 @@ void exchange_emptyIdentityToken() throws Exception {
     void billingExchange() throws Exception {
         // given
         String institutionId = "inst1";
-        Mockito.when(exchangeTokenServiceMock.retrieveBillingExchangedToken(institutionId, null))
+        Mockito.when(exchangeTokenServiceMock.retrieveBillingExchangedToken(institutionId))
                 .thenReturn(new ExchangedToken("token", "urlBO"));
         // when
         MvcResult result = mockMvc.perform(MockMvcRequestBuilders
@@ -107,7 +107,7 @@ void billingExchange() throws Exception {
         assertNotNull(resource);
         assertEquals(resource.toString(), "urlBO");
         verify(exchangeTokenServiceMock, Mockito.times(1))
-                .retrieveBillingExchangedToken(institutionId, null);
+                .retrieveBillingExchangedToken(institutionId);
         verifyNoMoreInteractions(exchangeTokenServiceMock);
     }
 
@@ -115,7 +115,7 @@ void billingExchange() throws Exception {
     void billingExchange_emptyIdentityToken() throws Exception {
         // given
         String institutionId = "inst1";
-        Mockito.when(exchangeTokenServiceMock.retrieveBillingExchangedToken(institutionId, null))
+        Mockito.when(exchangeTokenServiceMock.retrieveBillingExchangedToken(institutionId))
                 .thenReturn(new ExchangedToken("", ""));
         // when
         MvcResult result = mockMvc.perform(MockMvcRequestBuilders
@@ -130,7 +130,7 @@ void billingExchange_emptyIdentityToken() throws Exception {
         assertNotNull(resource);
         assertEquals(resource.toString(), "");
         verify(exchangeTokenServiceMock, Mockito.times(1))
-                .retrieveBillingExchangedToken(institutionId, null);
+                .retrieveBillingExchangedToken(institutionId);
         verifyNoMoreInteractions(exchangeTokenServiceMock);
     }
 }
\ No newline at end of file
diff --git a/web/src/test/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2Test.java b/web/src/test/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2Test.java
index 185efa0d..628fd554 100644
--- a/web/src/test/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2Test.java
+++ b/web/src/test/java/it/pagopa/selfcare/dashboard/web/security/ExchangeTokenServiceV2Test.java
@@ -644,7 +644,7 @@ void billingExchange_noAuth() throws Exception {
         JwtService jwtServiceMock = mock(JwtService.class);
         ExchangeTokenServiceV2 ExchangeTokenServiceV2 = new ExchangeTokenServiceV2(jwtServiceMock, null, null, null, properties, null, null, new InstitutionResourceMapperImpl());
         // when
-        Executable executable = () -> ExchangeTokenServiceV2.retrieveBillingExchangedToken(null, null);
+        Executable executable = () -> ExchangeTokenServiceV2.retrieveBillingExchangedToken(null);
         // then
         IllegalStateException e = assertThrows(IllegalStateException.class, executable);
         assertEquals("Authentication is required", e.getMessage());
@@ -710,7 +710,7 @@ void billingExchange_noSessionTokenClaims() throws Exception {
 
         ExchangeTokenServiceV2 ExchangeTokenServiceV2 = new ExchangeTokenServiceV2(jwtServiceMock, institutionServiceMock, groupServiceMock, productsConnector, properties, null, userApiConnector, new InstitutionResourceMapperImpl());
 
-        Executable executable = () -> ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId, null);
+        Executable executable = () -> ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId);
         // then
         RuntimeException e = assertThrows(IllegalArgumentException.class, executable);
         assertEquals("Session token claims is required", e.getMessage());
@@ -753,7 +753,7 @@ void billingExchange_noInstitutionInfo() throws Exception {
         TestingAuthenticationToken authentication = new TestingAuthenticationToken(SelfCareUser.builder("ccbc5350-0ba7-47bc-9f61-8c65001939f9").build(), "password", authorities);
         TestSecurityContextHolder.setAuthentication(authentication);
         // when
-        Executable executable = () -> ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId, null);
+        Executable executable = () -> ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId);
         // then
         RuntimeException e = assertThrows(IllegalArgumentException.class, executable);
         assertEquals("Institution info is required", e.getMessage());
@@ -850,7 +850,7 @@ void billingExchange_nullGroupInfo(PrivateKey privateKey) throws Exception {
         when(userApiConnector.getProducts(institutionId, String.valueOf(userId))).thenReturn(userInstitution);
         ExchangeTokenServiceV2 ExchangeTokenServiceV2 = new ExchangeTokenServiceV2(jwtServiceMock, institutionServiceMock, groupServiceMock, productsConnectorMock, properties, UserV2Service, userApiConnector, new InstitutionResourceMapperImpl());
         // when
-        final ExchangedToken exchangedToken = ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId, null);
+        final ExchangedToken exchangedToken = ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId);
         // then
         assertNotNull(exchangedToken.getIdentityToken());
         Jws<Claims> claimsJws = Jwts.parser()
@@ -892,7 +892,6 @@ void billingExchange_nullGroupInfo(PrivateKey privateKey) throws Exception {
     @EnumSource(PrivateKey.class)
     void billingExchange_ok(PrivateKey privateKey) throws Exception {
         // given
-        String lang = "en";
         String jti = "id";
         String credential = "password";
         Date iat = Date.from(Instant.now().minusSeconds(1));
@@ -976,7 +975,7 @@ void billingExchange_ok(PrivateKey privateKey) throws Exception {
         when(userApiConnector.getProducts(institutionId, String.valueOf(userId))).thenReturn(userInstitution);
         ExchangeTokenServiceV2 ExchangeTokenServiceV2 = new ExchangeTokenServiceV2(jwtServiceMock, institutionServiceMock, groupServiceMock, productsConnectorMock, properties, UserV2Service, userApiConnector, new InstitutionResourceMapperImpl());
         // when
-        final ExchangedToken exchangedToken = ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId, lang);
+        final ExchangedToken exchangedToken = ExchangeTokenServiceV2.retrieveBillingExchangedToken(institutionId);
         // then
         assertNotNull(exchangedToken.getIdentityToken());
         Jws<Claims> claimsJws = Jwts.parser()