diff --git a/app/delivery/web/api/restricted/jwtCookies.go b/app/delivery/web/api/restricted/jwtCookies.go
new file mode 100644
index 0000000..9666647
--- /dev/null
+++ b/app/delivery/web/api/restricted/jwtCookies.go
@@ -0,0 +1,57 @@
+package restricted
+
+import (
+	"git.ma-al.com/goc_daniel/b2b/app/service/jwtService"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/i18n"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/nullable"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/response"
+	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
+	"github.com/gofiber/fiber/v3"
+)
+
+// JWTCookiesHandler for updating JWT cookies.
+type JWTCookiesHandler struct {
+	jwtService *jwtService.JWTService
+}
+
+// NewJWTCookiesHandler creates a new JWTCookiesHandler instance
+func NewJWTCookiesHandler() *JWTCookiesHandler {
+	jwtService := jwtService.New()
+	return &JWTCookiesHandler{
+		jwtService: jwtService,
+	}
+}
+
+func JWTCookiesHandlerRoutes(r fiber.Router) fiber.Router {
+	handler := NewJWTCookiesHandler()
+
+	r.Get("/get-languages", handler.GetLanguages)
+	r.Get("/get-countries", handler.GetCountries)
+	r.Get("/update-choice", handler.UpdateChoice)
+
+	return r
+}
+
+func (h *JWTCookiesHandler) GetLanguages(c fiber.Ctx) error {
+	languages, err := h.jwtService.GetLanguages()
+	if err != nil {
+		return c.Status(responseErrors.GetErrorStatus(err)).
+			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
+	}
+
+	return c.JSON(response.Make(&languages, 0, i18n.T_(c, response.Message_OK)))
+}
+
+func (h *JWTCookiesHandler) GetCountries(c fiber.Ctx) error {
+	countries, err := h.jwtService.GetCountriesAndCurrencies()
+	if err != nil {
+		return c.Status(responseErrors.GetErrorStatus(err)).
+			JSON(response.Make(nullable.GetNil(""), 0, responseErrors.GetErrorCode(c, err)))
+	}
+
+	return c.JSON(response.Make(&countries, 0, i18n.T_(c, response.Message_OK)))
+}
+
+func (h *JWTCookiesHandler) UpdateChoice(c fiber.Ctx) error {
+	return nil
+}
diff --git a/app/delivery/web/init.go b/app/delivery/web/init.go
index dfcec34..efcc9a3 100644
--- a/app/delivery/web/init.go
+++ b/app/delivery/web/init.go
@@ -97,6 +97,11 @@ func (s *Server) Setup() error {
 	listProducts := s.restricted.Group("/list-products")
 	restricted.ListProductsHandlerRoutes(listProducts)
 
+	// changing the JWT cookies routes (restricted)
+	// in reality it just handles changing user's country and language
+	jwtUpdates := s.restricted.Group("/jwt-updates")
+	restricted.JWTCookiesHandlerRoutes(jwtUpdates)
+
 	// // Restricted routes example
 	// restricted := s.api.Group("/restricted")
 	// restricted.Use(middleware.AuthMiddleware())
diff --git a/app/model/countries.go b/app/model/countries.go
new file mode 100644
index 0000000..61972d2
--- /dev/null
+++ b/app/model/countries.go
@@ -0,0 +1,11 @@
+package model
+
+// Represents a country together with its associated currency
+type Country struct {
+	ID              uint   `gorm:"primaryKey;column:id" json:"id"`
+	Name            string `gorm:"column:name" json:"name"`
+	Flag            string `gorm:"size:16;not null;column:flag" json:"flag"`
+	CurrencyID      uint   `gorm:"column:id_currency" json:"currency_id"`
+	CurrencyISOCode string `gorm:"column:iso_code" json:"currency_iso_code"`
+	CurrencyName    string `gorm:"column:name" json:"currency_name"`
+}
diff --git a/app/service/authService/auth.go b/app/service/authService/auth.go
index d6c070c..089c3be 100644
--- a/app/service/authService/auth.go
+++ b/app/service/authService/auth.go
@@ -27,8 +27,8 @@ type JWTClaims struct {
 	Email     string             `json:"email"`
 	Username  string             `json:"username"`
 	Role      model.CustomerRole `json:"customer_role"`
-	FirstName string             `json:"first_name"`
-	LastName  string             `json:"last_name"`
+	CartsIDs  []uint             `json:"carts_ids"`
+	CountryID uint               `json:"country_id"`
 	jwt.RegisteredClaims
 }
 
@@ -476,8 +476,8 @@ func (s *AuthService) generateAccessToken(user *model.Customer) (string, error)
 		Email:     user.Email,
 		Username:  user.Email,
 		Role:      user.Role,
-		FirstName: user.FirstName,
-		LastName:  user.LastName,
+		CartsIDs:  []uint{},
+		CountryID: 1,
 		RegisteredClaims: jwt.RegisteredClaims{
 			ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Duration(s.config.JWTExpiration) * time.Second)),
 			IssuedAt:  jwt.NewNumericDate(time.Now()),
diff --git a/app/service/jwtService/jwtService.go b/app/service/jwtService/jwtService.go
new file mode 100644
index 0000000..fd5ee2d
--- /dev/null
+++ b/app/service/jwtService/jwtService.go
@@ -0,0 +1,28 @@
+package jwtService
+
+import (
+	"git.ma-al.com/goc_daniel/b2b/app/model"
+	"git.ma-al.com/goc_daniel/b2b/repository/jwtFieldsRepo"
+)
+
+// jwtService handles updating JWT cookies
+type JWTService struct {
+	repo jwtFieldsRepo.JWTFieldsRepo
+}
+
+// NewJWTService creates a new JWT service
+func New() *JWTService {
+	return &JWTService{}
+}
+
+func (s *JWTService) GetLanguages() ([]model.Language, error) {
+	return s.repo.GetLanguages()
+}
+
+func (s *JWTService) GetCountriesAndCurrencies() ([]model.Country, error) {
+	return s.repo.GetCountriesAndCurrencies()
+}
+
+func (s *JWTService) UpdateChoice() error {
+	return nil
+}
diff --git a/i18n/migrations/20260302163122_create_tables.sql b/i18n/migrations/20260302163122_create_tables.sql
index e335d0f..721b18e 100644
--- a/i18n/migrations/20260302163122_create_tables.sql
+++ b/i18n/migrations/20260302163122_create_tables.sql
@@ -24,7 +24,7 @@ INSERT IGNORE INTO b2b_language
 VALUES
   (1, '2022-09-16 17:10:02.837', '2026-03-02 21:24:36.779730', NULL, 'Polski', 'pl', 'pl', '__-__-____', '__-__', 0, 0, 1, '🇵🇱'),
   (2, '2022-09-16 17:10:02.852', '2026-03-02 21:24:36.779730', NULL, 'English', 'en', 'en', '__-__-____', '__-__', 0, 1, 1, '🇬🇧'),
-  (3, '2022-09-16 17:10:02.865', '2026-03-02 21:24:36.779730', NULL, 'Čeština', 'cs', 'cs', '__-__-____', '__-__', 0, 0, 1, '🇨🇿'),
+  (3, '2022-09-16 17:10:02.865', '2026-03-02 21:24:36.779730', NULL, 'Čeština', 'cs', 'cs', '__-__-____', '__-__', 0, 0, 0, '🇨🇿'),
   (4, '2022-09-16 17:10:02.852', '2026-03-02 21:24:36.779730', NULL, 'Deutsch', 'de', 'de', '__-__-____', '__-__', 0, 0, 1, '🇩🇪');
 
 CREATE TABLE IF NOT EXISTS b2b_components (
@@ -119,8 +119,26 @@ VALUES
   (1, 'admin@ma-al.com', '$2a$10$Owy9DjrS0l3Fz4XoOvh5pulgmOMqdwXmb7hYE9BovnSuWS2plGr82', 'Super', 'Admin', 'admin', 'local', '', '', 1, 1, NULL, NULL, '', NULL, NULL, NULL, 'pl', '2026-03-02 16:55:10.252740', '2026-03-02 16:55:10.252740', NULL);
 ALTER TABLE b2b_customers AUTO_INCREMENT = 1;
 
+-- countries
+CREATE TABLE IF NOT EXISTS b2b_countries (
+  id          INT AUTO_INCREMENT PRIMARY KEY,
+  name        VARCHAR(128) NOT NULL,
+  currency    INT UNSIGNED NOT NULL,
+  flag        VARCHAR(16) NOT NULL,
+  CONSTRAINT fk_countries_currency FOREIGN KEY (currency) REFERENCES ps_currency(id_currency) ON DELETE RESTRICT ON UPDATE RESTRICT
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+INSERT IGNORE INTO b2b_countries
+  (id, name, currency, flag)
+VALUES
+  (1, 'Polska', 1, '🇵🇱'),
+  (2, 'England', 2, '🇬🇧'),
+  (3, 'Čeština', 2, '🇨🇿'),
+  (4, 'Deutschland', 2, '🇩🇪');
+
 -- +goose Down
 
+DROP TABLE IF EXISTS b2b_countries;
 DROP TABLE IF EXISTS b2b_language;
 DROP TABLE IF EXISTS b2b_components;
 DROP TABLE IF EXISTS b2b_scopes;
diff --git a/repository/jwtFieldsRepo/jwtFieldsRepo.go b/repository/jwtFieldsRepo/jwtFieldsRepo.go
new file mode 100644
index 0000000..b112ef0
--- /dev/null
+++ b/repository/jwtFieldsRepo/jwtFieldsRepo.go
@@ -0,0 +1,36 @@
+package jwtFieldsRepo
+
+import (
+	"git.ma-al.com/goc_daniel/b2b/app/db"
+	"git.ma-al.com/goc_daniel/b2b/app/model"
+)
+
+type UIJWTFieldsRepo interface {
+	GetLanguages() ([]model.Language, error)
+	GetCountriesAndCurrencies() ([]model.Country, error)
+}
+
+type JWTFieldsRepo struct{}
+
+func New() UIJWTFieldsRepo {
+	return &JWTFieldsRepo{}
+}
+
+func (repo *JWTFieldsRepo) GetLanguages() ([]model.Language, error) {
+	var languages []model.Language
+
+	err := db.DB.Table("b2b_language").Scan(&languages).Error
+
+	return languages, err
+}
+
+func (repo *JWTFieldsRepo) GetCountriesAndCurrencies() ([]model.Country, error) {
+	var countries []model.Country
+
+	err := db.DB.Table("b2b_countries").
+		Select("b2b_countries.id, b2b_countries.name, b2b_countries.flag, ps_currency.id as id_currency, ps_currency.name as currency_name, ps_currency.iso_code as currency_iso_code").
+		Joins("JOIN ps_currency ON ps_currency.id = b2b_countries.currency").
+		Scan(&countries).Error
+
+	return countries, err
+}