diff --git a/server/bundles/io.cloudbeaver.server/schema/service.core.graphqls b/server/bundles/io.cloudbeaver.server/schema/service.core.graphqls
index 7c39847187..701e0df230 100644
--- a/server/bundles/io.cloudbeaver.server/schema/service.core.graphqls
+++ b/server/bundles/io.cloudbeaver.server/schema/service.core.graphqls
@@ -416,7 +416,7 @@ extend type Query {
 
 extend type Mutation {
     # Initialize session
-    openSession: SessionInfo!
+    openSession(defaultLocale: String): SessionInfo!
 
     # Destroy session
     closeSession: Boolean
diff --git a/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/DBWServiceCore.java b/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/DBWServiceCore.java
index bafc61591e..ed981c97a2 100644
--- a/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/DBWServiceCore.java
+++ b/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/DBWServiceCore.java
@@ -64,7 +64,7 @@ public interface DBWServiceCore extends DBWService {
     // Session
 
     @WebAction(requirePermissions = {})
-    WebSession openSession(@NotNull WebSession webSession) throws DBWebException;
+    WebSession openSession(@NotNull WebSession webSession, @Nullable String defaultLocale) throws DBWebException;
 
     @WebAction(requirePermissions = {})
     WebSession getSessionState(@NotNull WebSession webSession) throws DBWebException;
diff --git a/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/WebServiceBindingCore.java b/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/WebServiceBindingCore.java
index 4c19c47ac9..0fa0d660be 100644
--- a/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/WebServiceBindingCore.java
+++ b/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/WebServiceBindingCore.java
@@ -80,7 +80,8 @@ public class WebServiceBindingCore extends WebServiceBindingBase<DBWServiceCore>
 
         model.getMutationType()
             .dataFetcher("openSession", env -> getService(env).openSession(
-                sessionManager.getWebSession(GraphQLEndpoint.getServletRequest(env), GraphQLEndpoint.getServletResponse(env), false)))
+                sessionManager.getWebSession(GraphQLEndpoint.getServletRequest(env), GraphQLEndpoint.getServletResponse(env), false),
+                env.getArgument("defaultLocale")))
             .dataFetcher("closeSession", env -> getService(env).closeSession(GraphQLEndpoint.getServletRequest(env)))
             .dataFetcher("touchSession", env -> getService(env).touchSession(
                 GraphQLEndpoint.getServletRequest(env), GraphQLEndpoint.getServletResponse(env)))
diff --git a/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/impl/WebServiceCore.java b/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/impl/WebServiceCore.java
index 8aced9bf54..f31da10558 100644
--- a/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/impl/WebServiceCore.java
+++ b/server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/service/core/impl/WebServiceCore.java
@@ -152,7 +152,8 @@ public class WebServiceCore implements DBWServiceCore {
     }
 
     @Override
-    public WebSession openSession(@NotNull WebSession webSession) {
+    public WebSession openSession(@NotNull WebSession webSession, @Nullable String defaultLocale) {
+        webSession.setLocale(defaultLocale);
         return webSession;
     }