diff --git a/src/components/home/FeaturesSection.jsx b/src/components/home/FeaturesSection.jsx
index 37babcfa..cb4cb0e4 100644
--- a/src/components/home/FeaturesSection.jsx
+++ b/src/components/home/FeaturesSection.jsx
@@ -16,7 +16,7 @@ const FeaturesSection = ({ t }) => {
             <div className="container">
                 <div className="features-header">
                     <h2 className="section-title">{t('whatWeOffer')}</h2>
-                    <p className="section-subtitle">Everything you need for your perfect travel experience</p>
+                    <p className="section-subtitle">{t('whatWeOfferSubtitle')}</p>
                 </div>
 
                 <div className="features-grid">
diff --git a/src/components/preferences/PreferenceForm.jsx b/src/components/preferences/PreferenceForm.jsx
index 26a7fb66..57f00e49 100644
--- a/src/components/preferences/PreferenceForm.jsx
+++ b/src/components/preferences/PreferenceForm.jsx
@@ -19,7 +19,7 @@ const CATEGORY_ICONS = {
 /**
  * Preference form for creating/editing preference profiles
  */
-const PreferenceForm = ({ t, formData, setFormData, editingProfile, onSubmit, onClose }) => {
+const PreferenceForm = ({ t, formData, setFormData, editingProfile, onSubmit, onClose, showError }) => {
     const toggleCategory = (category) => {
         setFormData(prev => {
             const categories = prev.categories || [];
@@ -32,6 +32,24 @@ const PreferenceForm = ({ t, formData, setFormData, editingProfile, onSubmit, on
         });
     };
 
+    const handleSubmit = (e) => {
+        e.preventDefault();
+
+        // Validate name
+        if (!formData.name || !formData.name.trim()) {
+            showError(t('profileNameRequired'));
+            return;
+        }
+
+        // Validate categories
+        if (!formData.categories || formData.categories.length === 0) {
+            showError(t('categoryMinOne'));
+            return;
+        }
+
+        onSubmit(e);
+    };
+
     return (
         <div className="preference-form animate-fadeInUp">
             <div className="form-header">
@@ -41,7 +59,7 @@ const PreferenceForm = ({ t, formData, setFormData, editingProfile, onSubmit, on
                 </button>
             </div>
 
-            <form onSubmit={onSubmit}>
+            <form onSubmit={handleSubmit}>
                 <div className="form-group">
                     <label className="form-label">{t('profileName')}</label>
                     <input
@@ -49,10 +67,8 @@ const PreferenceForm = ({ t, formData, setFormData, editingProfile, onSubmit, on
                         value={formData.name}
                         onChange={(e) => setFormData({ ...formData, name: e.target.value })}
                         className="form-input"
-                        placeholder="e.g., Weekend Getaway"
+                        placeholder={t('profileNamePlaceholder')}
                         required
-                        pattern=".*\S+.*"
-                        title="Profile name cannot be empty or contain only whitespace"
                     />
                 </div>
 
@@ -67,7 +83,7 @@ const PreferenceForm = ({ t, formData, setFormData, editingProfile, onSubmit, on
                                 onClick={() => toggleCategory(cat)}
                             >
                                 <span className="category-icon">{CATEGORY_ICONS[cat]}</span>
-                                <span className="category-name">{cat}</span>
+                                <span className="category-name">{t(cat)}</span>
                             </button>
                         ))}
                     </div>
@@ -88,3 +104,4 @@ const PreferenceForm = ({ t, formData, setFormData, editingProfile, onSubmit, on
 
 export { PreferenceForm, CATEGORY_ICONS };
 export default PreferenceForm;
+
diff --git a/src/components/preferences/ProfileCard.jsx b/src/components/preferences/ProfileCard.jsx
index 9c08c6e9..caaee90c 100644
--- a/src/components/preferences/ProfileCard.jsx
+++ b/src/components/preferences/ProfileCard.jsx
@@ -35,11 +35,11 @@ const ProfileCard = ({ t, profile, isActive, index, onActivate, onEdit, onDelete
                     <div className="profile-tags">
                         {(profile.categories || []).map(cat => (
                             <span key={cat} className="profile-tag">
-                                {CATEGORY_ICONS[cat]} {cat}
+                                {CATEGORY_ICONS[cat]} {t(cat)}
                             </span>
                         ))}
                         {(!profile.categories || profile.categories.length === 0) && (
-                            <span className="no-data">No categories selected</span>
+                            <span className="no-data">{t('noCategoriesSelected')}</span>
                         )}
                     </div>
                 </div>
diff --git a/src/components/recommendations/RecommendationFilters.jsx b/src/components/recommendations/RecommendationFilters.jsx
index 84c2f05b..6c1325c0 100644
--- a/src/components/recommendations/RecommendationFilters.jsx
+++ b/src/components/recommendations/RecommendationFilters.jsx
@@ -58,10 +58,10 @@ const RecommendationFilters = ({
                         />
                     </div>
                     <div className="filter-group filter-group--sort">
-                        <label className="filter-label">{t('sortBy') || 'Sort By'}</label>
+                        <label className="filter-label">{t('sortBy')}</label>
                         <select value={sortBy} onChange={onSortChange} className="filter-select">
-                            <option value="distance">{t('sortByDistance') || 'Distance'}</option>
-                            <option value="rating">{t('sortByRating') || 'Rating'}</option>
+                            <option value="distance">{t('sortByDistance')}</option>
+                            <option value="rating">{t('sortByRating')}</option>
                         </select>
                     </div>
                     <div className="filter-group filter-group--action">
diff --git a/src/i18n/locales/el/common.json b/src/i18n/locales/el/common.json
index 9c405930..fa7d7b91 100644
--- a/src/i18n/locales/el/common.json
+++ b/src/i18n/locales/el/common.json
@@ -41,6 +41,7 @@
         "ctaDescription": "Γίνετε μέλος χιλιάδων ταξιδιωτών που ανακαλύπτουν εκπληκτικούς προορισμούς κάθε μέρα.",
         "exploreDestinations": "Εξερευνήστε Προορισμούς",
         "whatWeOffer": "Τι προσφέρουμε",
+        "whatWeOfferSubtitle": "Ό,τι χρειάζεστε για μια τέλεια ταξιδιωτική εμπειρία",
         "personalizedRecommendations": "Εξατομικευμένες Προτάσεις",
         "personalizedRecommendationsDesc": "Λάβετε προτάσεις βασισμένες στις προτιμήσεις σας",
         "reviews": "Αξιολογήσεις",
@@ -68,7 +69,8 @@
         "haveAccount": "Έχετε ήδη λογαριασμό;",
         "loginLink": "Συνδεθείτε εδώ",
         "signupError": "Σφάλμα εγγραφής. Το email μπορεί να χρησιμοποιείται ήδη",
-        "passwordRequirement": "Τουλάχιστον 6 χαρακτήρες (κεφαλαίο, πεζό, αριθμό)"
+        "passwordRequirement": "Τουλάχιστον 6 χαρακτήρες (κεφαλαίο, πεζό, αριθμό)",
+        "namePlaceholder": "Γιάννης Παπαδόπουλος"
     },
     "validation": {
         "invalidEmail": "Μη έγκυρη διεύθυνση email",
diff --git a/src/i18n/locales/el/features.json b/src/i18n/locales/el/features.json
index 22a47b14..d2020a2b 100644
--- a/src/i18n/locales/el/features.json
+++ b/src/i18n/locales/el/features.json
@@ -3,6 +3,7 @@
         "from": "Από",
         "to": "Προς",
         "getRoute": "Εύρεση Διαδρομής",
+        "navigationTitle": "Πλοήγηση Διαδρομής",
         "navigationSubtitle": "Βρείτε τη διαδρομή προς τον προορισμό σας",
         "calculateRoute": "Υπολογισμός Διαδρομής",
         "startPoint": "Σημείο Εκκίνησης",
@@ -22,6 +23,9 @@
         "minutes": "λεπτά",
         "mapView": "Προβολή χάρτη (θα ενσωματωθεί σε μελλοντική έκδοση)",
         "quickRoutes": "Γρήγορες Διαδρομές",
+        "routeAthensToThessaloniki": "Αθήνα → Θεσσαλονίκη",
+        "routeThessalonikiToAthens": "Θεσσαλονίκη → Αθήνα",
+        "routeHeraklionToAthens": "Ηράκλειο → Αθήνα",
         "resolvingLocation": "Εύρεση τοποθεσίας...",
         "enterLocation": "Τοποθεσία",
         "searchLocationPlaceholder": "π.χ., Αθήνα, Ελλάδα",
@@ -31,7 +35,7 @@
         "enterLocationsToStart": "Εισάγετε τοποθεσίες ή επιλέξτε μια γρήγορη διαδρομή"
     },
     "recommendationsPage": {
-        "recommendationsTitle": "✨ Προτάσεις για Εσάς",
+        "recommendationsTitle": "Προτάσεις για Εσάς",
         "recommendationsSubtitle": "Εξατομικευμένες προτάσεις βασισμένες στις προτιμήσεις σας",
         "filtersTitle": "Φίλτρα Αναζήτησης",
         "latitude": "Γεωγραφικό Πλάτος",
@@ -42,8 +46,14 @@
         "errorLoadingRecommendations": "Σφάλμα κατά τη φόρτωση των προτάσεων",
         "noRecommendationsFound": "Δεν βρέθηκαν προτάσεις",
         "tryAgain": "Προσπάθεια Ξανά",
+        "createProfileForRecommendations": "Δημιουργήστε ένα προφίλ προτιμήσεων για να δείτε προτάσεις",
         "goToPreferences": "Πηγαίνετε στο \"⚙️ Προφίλ Προτιμήσεων\" για να δημιουργήσετε ένα προφίλ",
-        "tryDifferentFilters": "Δοκιμάστε να αλλάξετε τα φίλτρα αναζήτησης ή τις κατηγορίες στο προφίλ σας"
+        "tryDifferentFilters": "Δοκιμάστε να αλλάξετε τα φίλτρα αναζήτησης ή τις κατηγορίες στο προφίλ σας",
+        "sortBy": "Ταξινόμηση",
+        "sortByDistance": "Απόσταση",
+        "sortByRating": "Αξιολόγηση",
+        "recommendationSingular": "Πρόταση",
+        "recommendationPlural": "Προτάσεις"
     },
     "placeDetails": {
         "location": "Τοποθεσία",
@@ -105,6 +115,8 @@
         "HOTEL": "Ξενοδοχείο",
         "CAFE": "Καφετέρια",
         "BAR": "Μπαρ",
+        "NIGHTLIFE": "Νυχτερινή Ζωή",
+        "SPORTS": "Αθλητισμός",
         "cheap": "Οικονομικό",
         "moderate": "Μέτριο",
         "expensive": "Ακριβό"
diff --git a/src/i18n/locales/el/pages.json b/src/i18n/locales/el/pages.json
index 5930a20c..d072fca6 100644
--- a/src/i18n/locales/el/pages.json
+++ b/src/i18n/locales/el/pages.json
@@ -51,7 +51,10 @@
         "errorUpdatingProfile": "Σφάλμα κατά την ενημέρωση του προφίλ",
         "confirmDeleteProfile": "Είστε σίγουροι ότι θέλετε να διαγράψετε αυτό το προφίλ;",
         "errorDeletingProfile": "Σφάλμα κατά τη διαγραφή του προφίλ",
-        "errorActivatingProfile": "Σφάλμα κατά την ενεργοποίηση του προφίλ"
+        "errorActivatingProfile": "Σφάλμα κατά την ενεργοποίηση του προφίλ",
+        "noCategoriesSelected": "Δεν έχουν επιλεγεί κατηγορίες",
+        "profileNamePlaceholder": "π.χ., Σαββατοκύριακο",
+        "profileNameRequired": "Το όνομα προφίλ δεν μπορεί να είναι κενό ή να περιέχει μόνο κενά"
     },
     "favouritesPage": {
         "favouritesTitle": "Τα Αγαπημένα σας Μέρη",
diff --git a/src/i18n/locales/en/common.json b/src/i18n/locales/en/common.json
index 3d308a95..680ae611 100644
--- a/src/i18n/locales/en/common.json
+++ b/src/i18n/locales/en/common.json
@@ -41,6 +41,7 @@
         "ctaDescription": "Join thousands of travelers discovering amazing destinations every day.",
         "exploreDestinations": "Explore Destinations",
         "whatWeOffer": "What We Offer",
+        "whatWeOfferSubtitle": "Everything you need for your perfect travel experience",
         "personalizedRecommendations": "Personalized Recommendations",
         "personalizedRecommendationsDesc": "Get recommendations based on your preferences",
         "reviews": "Reviews",
@@ -68,7 +69,8 @@
         "haveAccount": "Already have an account?",
         "loginLink": "Login here",
         "signupError": "Signup error. Email may already be in use",
-        "passwordRequirement": "At least 6 characters (uppercase, lowercase, number)"
+        "passwordRequirement": "At least 6 characters (uppercase, lowercase, number)",
+        "namePlaceholder": "John Doe"
     },
     "validation": {
         "invalidEmail": "Invalid email address",
diff --git a/src/i18n/locales/en/features.json b/src/i18n/locales/en/features.json
index 6ad1ba4d..feeec099 100644
--- a/src/i18n/locales/en/features.json
+++ b/src/i18n/locales/en/features.json
@@ -3,6 +3,7 @@
         "from": "From",
         "to": "To",
         "getRoute": "Get Route",
+        "navigationTitle": "Route Navigation",
         "navigationSubtitle": "Find the route to your destination",
         "calculateRoute": "Calculate Route",
         "startPoint": "Starting Point",
@@ -22,6 +23,9 @@
         "minutes": "minutes",
         "mapView": "Map view (will be integrated in future version)",
         "quickRoutes": "Quick Routes",
+        "routeAthensToThessaloniki": "Athens → Thessaloniki",
+        "routeThessalonikiToAthens": "Thessaloniki → Athens",
+        "routeHeraklionToAthens": "Heraklion → Athens",
         "resolvingLocation": "Resolving location...",
         "enterLocation": "Location",
         "searchLocationPlaceholder": "e.g., Athens, Greece",
@@ -31,7 +35,7 @@
         "enterLocationsToStart": "Enter locations or select a quick route to get started"
     },
     "recommendationsPage": {
-        "recommendationsTitle": "✨ Recommendations for You",
+        "recommendationsTitle": "Recommendations for You",
         "recommendationsSubtitle": "Personalized recommendations based on your preferences",
         "filtersTitle": "Search Filters",
         "latitude": "Latitude",
@@ -42,8 +46,14 @@
         "errorLoadingRecommendations": "Error loading recommendations",
         "noRecommendationsFound": "No recommendations found",
         "tryAgain": "Try Again",
+        "createProfileForRecommendations": "Create a preference profile to see recommendations",
         "goToPreferences": "Go to \"⚙️ Preference Profile\" to create a profile",
-        "tryDifferentFilters": "Try changing the search filters or categories in your profile"
+        "tryDifferentFilters": "Try changing the search filters or categories in your profile",
+        "sortBy": "Sort By",
+        "sortByDistance": "Distance",
+        "sortByRating": "Rating",
+        "recommendationSingular": "Recommendation",
+        "recommendationPlural": "Recommendations"
     },
     "placeDetails": {
         "location": "Location",
@@ -105,6 +115,8 @@
         "HOTEL": "Hotel",
         "CAFE": "Cafe",
         "BAR": "Bar",
+        "NIGHTLIFE": "Nightlife",
+        "SPORTS": "Sports",
         "cheap": "Cheap",
         "moderate": "Moderate",
         "expensive": "Expensive"
diff --git a/src/i18n/locales/en/pages.json b/src/i18n/locales/en/pages.json
index 8db8f443..0bbe9a83 100644
--- a/src/i18n/locales/en/pages.json
+++ b/src/i18n/locales/en/pages.json
@@ -51,7 +51,10 @@
         "errorUpdatingProfile": "Error updating profile",
         "confirmDeleteProfile": "Are you sure you want to delete this profile?",
         "errorDeletingProfile": "Error deleting profile",
-        "errorActivatingProfile": "Error activating profile"
+        "errorActivatingProfile": "Error activating profile",
+        "noCategoriesSelected": "No categories selected",
+        "profileNamePlaceholder": "e.g., Weekend Getaway",
+        "profileNameRequired": "Profile name cannot be empty or contain only whitespace"
     },
     "favouritesPage": {
         "favouritesTitle": "Your Favourite Places",
diff --git a/src/pages/LoginPage.jsx b/src/pages/LoginPage.jsx
index 185ca714..950e1c20 100644
--- a/src/pages/LoginPage.jsx
+++ b/src/pages/LoginPage.jsx
@@ -112,7 +112,7 @@ const LoginPage = () => {
                 )}
 
                 {error && (
-                  <Alert variant="error" title="Error" data-testid="auth-error">
+                  <Alert variant="error" title={t('error')} data-testid="auth-error">
                     {error}
                   </Alert>
                 )}
diff --git a/src/pages/NavigationPage.jsx b/src/pages/NavigationPage.jsx
index f926aa92..8da9e9e7 100644
--- a/src/pages/NavigationPage.jsx
+++ b/src/pages/NavigationPage.jsx
@@ -34,9 +34,9 @@ import './NavigationPage.css';
 
 /** Predefined quick routes for popular destinations */
 const QUICK_ROUTES = [
-  { name: 'Athens → Thessaloniki', icon: '🏛️', from: 'Athens, Greece', to: 'Thessaloniki, Greece' },
-  { name: 'Thessaloniki → Athens', icon: '🏛️', from: 'Thessaloniki, Greece', to: 'Athens, Greece' },
-  { name: 'Heraklion → Athens', icon: '🏖️', from: 'Heraklion, Crete, Greece', to: 'Athens, Greece' },
+  { nameKey: 'routeAthensToThessaloniki', icon: '🏛️', from: 'Athens, Greece', to: 'Thessaloniki, Greece' },
+  { nameKey: 'routeThessalonikiToAthens', icon: '🏛️', from: 'Thessaloniki, Greece', to: 'Athens, Greece' },
+  { nameKey: 'routeHeraklionToAthens', icon: '🏖️', from: 'Heraklion, Crete, Greece', to: 'Athens, Greece' },
 ];
 
 /**
@@ -95,7 +95,7 @@ const NavigationPage = () => {
   return (
     <div className="navigation-page">
       {/* Hero section with page title */}
-      <Hero title={t('Route Navigation')} subtitle={t('navigationSubtitle')} size="small" align="center" />
+      <Hero title={t('navigationTitle')} subtitle={t('navigationSubtitle')} size="small" align="center" />
 
       <div className="container">
         {/* Main navigation layout with form and results columns */}
@@ -120,7 +120,7 @@ const NavigationPage = () => {
               <button key={index} className="quick-route-btn"
                 onClick={() => setFormData({ fromLocation: route.from, toLocation: route.to, transportMode: 'DRIVING' })}>
                 <span className="route-emoji">{route.icon}</span>
-                <span className="route-name">{route.name}</span>
+                <span className="route-name">{t(route.nameKey)}</span>
                 <Icon name="arrow" size="sm" className="route-arrow" />
               </button>
             ))}
diff --git a/src/pages/PreferencesPage.jsx b/src/pages/PreferencesPage.jsx
index 23b92d23..d7238218 100644
--- a/src/pages/PreferencesPage.jsx
+++ b/src/pages/PreferencesPage.jsx
@@ -73,8 +73,8 @@ const PreferencesPage = () => {
     if (loading) {
         return (
             <div className="preferences-page">
-                <Hero title={t('preferenceProfiles')} subtitle={t('managePreferenceProfiles')} 
-                      size="small" align="center" />
+                <Hero title={t('preferenceProfiles')} subtitle={t('managePreferenceProfiles')}
+                    size="small" align="center" />
                 <div className="container">
                     <div className="loading-state">
                         <Spinner size="lg" />
@@ -89,8 +89,8 @@ const PreferencesPage = () => {
     if (error) {
         return (
             <div className="preferences-page">
-                <Hero title={t('preferenceProfiles')} subtitle={t('managePreferenceProfiles')} 
-                      size="small" align="center" />
+                <Hero title={t('preferenceProfiles')} subtitle={t('managePreferenceProfiles')}
+                    size="small" align="center" />
                 <div className="container">
                     <div className="error-state">
                         <Icon name="alert" size="2xl" />
@@ -103,8 +103,8 @@ const PreferencesPage = () => {
 
     return (
         <div className="preferences-page">
-            <Hero title={t('preferenceProfiles')} subtitle={t('managePreferenceProfiles')} 
-                  size="small" align="center" />
+            <Hero title={t('preferenceProfiles')} subtitle={t('managePreferenceProfiles')}
+                size="small" align="center" />
 
             <div className="container">
                 {/* Create new profile button */}
@@ -124,6 +124,7 @@ const PreferencesPage = () => {
                         editingProfile={editingProfile}
                         onSubmit={editingProfile ? handleUpdate : handleCreate}
                         onClose={closeForm}
+                        showError={showError}
                     />
                 )}
 
diff --git a/src/pages/RecommendationsPage.jsx b/src/pages/RecommendationsPage.jsx
index 3a16dc4a..bd8f456c 100644
--- a/src/pages/RecommendationsPage.jsx
+++ b/src/pages/RecommendationsPage.jsx
@@ -99,7 +99,7 @@ const RecommendationsPage = () => {
             // Info state: API message (e.g., no active profile)
             <div className="info-state">
               <div className="info-icon">ℹ️</div>
-              <h3>{message}</h3>
+              <h3>{t('createProfileForRecommendations')}</h3>
               <p>{t('goToPreferences')}</p>
               <Button variant="primary" onClick={() => window.location.href = '/preferences'}>{t('preferences')}</Button>
             </div>
@@ -107,7 +107,7 @@ const RecommendationsPage = () => {
             // Success state: show recommendations grid
             <>
               <div className="results-header">
-                <h2 className="results-title">{recommendations.length} {recommendations.length === 1 ? 'Recommendation' : 'Recommendations'}</h2>
+                <h2 className="results-title">{recommendations.length} {recommendations.length === 1 ? t('recommendationSingular') : t('recommendationPlural')}</h2>
               </div>
               <div className="recommendations-grid">
                 {recommendations.map((rec, index) => (
diff --git a/src/pages/SignupPage.jsx b/src/pages/SignupPage.jsx
index 1a1f2fe3..3312cf9a 100644
--- a/src/pages/SignupPage.jsx
+++ b/src/pages/SignupPage.jsx
@@ -63,7 +63,7 @@ const SignupPage = () => {
       });
 
       storeUserSession(response);
-      navigate('/');
+      navigate('/preferences');
     } catch (err) {
       console.error('Signup error:', err);
       setError(extractErrorMessage(err, t('signupError')));
@@ -89,7 +89,7 @@ const SignupPage = () => {
           {({ isSubmitting, errors, touched }) => (
             <Form className="auth-form">
               {error && (
-                <Alert variant="error" title="Error" data-testid="auth-error">
+                <Alert variant="error" title={t('error')} data-testid="auth-error">
                   {error}
                 </Alert>
               )}
@@ -100,7 +100,7 @@ const SignupPage = () => {
                   type="text"
                   id="name"
                   name="name"
-                  placeholder="John Doe"
+                  placeholder={t('namePlaceholder')}
                   className={errors.name && touched.name ? 'error' : ''}
                   data-cy="input-name"
                 />