diff --git a/maternal-web/app/settings/page.tsx b/maternal-web/app/settings/page.tsx
index 229040c..62973b0 100644
--- a/maternal-web/app/settings/page.tsx
+++ b/maternal-web/app/settings/page.tsx
@@ -18,8 +18,10 @@ import { MeasurementUnitSelector } from '@/components/settings/MeasurementUnitSe
 import { TimeZoneSelector } from '@/components/settings/TimeZoneSelector';
 import { TimeFormatSelector } from '@/components/settings/TimeFormatSelector';
 import { motion } from 'framer-motion';
+import { useTranslation } from '@/hooks/useTranslation';
 
 export default function SettingsPage() {
+  const { t } = useTranslation('settings');
   const { user, logout, refreshUser } = useAuth();
   const [name, setName] = useState(user?.name || '');
   const [timezone, setTimezone] = useState(user?.timezone || 'UTC');
@@ -61,7 +63,7 @@ export default function SettingsPage() {
   const handleSaveAll = async () => {
     // Validate name
     if (!name || name.trim() === '') {
-      setNameError('Name cannot be empty');
+      setNameError(t('profile.nameRequired'));
       return;
     }
 
@@ -83,7 +85,7 @@ export default function SettingsPage() {
       // Refresh user to get latest data from server
       await refreshUser();
 
-      setSuccessMessage('Settings saved successfully!');
+      setSuccessMessage(t('saved'));
     } catch (err: any) {
       console.error('❌ Failed to save settings:', err);
       console.error('Error response:', err.response);
@@ -102,10 +104,10 @@ export default function SettingsPage() {
       <AppShell>
         <Box sx={{ maxWidth: 'md', mx: 'auto' }}>
       <Typography variant="h4" component="h1" fontWeight="600" gutterBottom>
-        Settings
+        {t('title')}
       </Typography>
       <Typography variant="body1" color="text.secondary" sx={{ mb: 4 }}>
-        Manage your account settings and preferences
+        {t('profile.title')}
       </Typography>
 
       {/* Error Alert */}
@@ -130,11 +132,11 @@ export default function SettingsPage() {
         <Card sx={{ mb: 3 }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
-              Profile Information
+              {t('profile.title')}
             </Typography>
             <Box sx={{ display: 'flex', flexDirection: 'column', gap: 2, mt: 2 }}>
               <TextField
-                label="Name"
+                label={t('profile.name')}
                 value={name}
                 onChange={(e) => {
                   setName(e.target.value);
@@ -146,11 +148,11 @@ export default function SettingsPage() {
                 disabled={isLoading}
               />
               <TextField
-                label="Email"
+                label={t('profile.email')}
                 value={user?.email || ''}
                 fullWidth
                 disabled
-                helperText="Email cannot be changed"
+                helperText={t('profile.emailNotEditable')}
               />
             </Box>
           </CardContent>
@@ -166,7 +168,7 @@ export default function SettingsPage() {
         <Card sx={{ mb: 3 }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
-              Preferences
+              {t('preferences.title')}
             </Typography>
             <Box sx={{ display: 'flex', flexDirection: 'column', gap: 3, mt: 2 }}>
               <LanguageSelector />
@@ -193,7 +195,7 @@ export default function SettingsPage() {
         <Card sx={{ mb: 3 }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
-              Notifications
+              {t('notifications.title')}
             </Typography>
             <Box sx={{ display: 'flex', flexDirection: 'column', gap: 1, mt: 2 }}>
               <FormControlLabel
@@ -204,7 +206,7 @@ export default function SettingsPage() {
                     disabled={isLoading}
                   />
                 }
-                label="Push Notifications"
+                label={t('notifications.push')}
               />
               <FormControlLabel
                 control={
@@ -214,7 +216,7 @@ export default function SettingsPage() {
                     disabled={isLoading}
                   />
                 }
-                label="Email Updates"
+                label={t('notifications.email')}
               />
             </Box>
           </CardContent>
@@ -230,7 +232,7 @@ export default function SettingsPage() {
         <Card sx={{ mb: 3 }}>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
-              Appearance
+              {t('appearance.title')}
             </Typography>
             <Box sx={{ mt: 2 }}>
               <FormControlLabel
@@ -240,7 +242,7 @@ export default function SettingsPage() {
                     onChange={(e) => setSettings({ ...settings, darkMode: e.target.checked })}
                   />
                 }
-                label="Dark Mode (Coming Soon)"
+                label={t('appearance.darkMode')}
                 disabled
               />
             </Box>
@@ -329,7 +331,7 @@ export default function SettingsPage() {
             disabled={isLoading}
             sx={{ minWidth: 200 }}
           >
-            {isLoading ? 'Saving...' : 'Save Preferences'}
+            {isLoading ? t('saving') : t('save')}
           </Button>
         </Box>
       </motion.div>
@@ -343,7 +345,7 @@ export default function SettingsPage() {
         <Card>
           <CardContent>
             <Typography variant="h6" component="h2" fontWeight="600" gutterBottom>
-              Account Actions
+              {t('accountActions.title')}
             </Typography>
             <Divider sx={{ my: 2 }} />
             <Button
@@ -353,7 +355,7 @@ export default function SettingsPage() {
               onClick={handleLogout}
               fullWidth
             >
-              Logout
+              {t('accountActions.logout')}
             </Button>
           </CardContent>
         </Card>
diff --git a/maternal-web/app/track/activity/page.tsx b/maternal-web/app/track/activity/page.tsx
index a4af626..e099431 100644
--- a/maternal-web/app/track/activity/page.tsx
+++ b/maternal-web/app/track/activity/page.tsx
@@ -31,7 +31,6 @@ import {
   Delete,
   Refresh,
   Add,
-  FitnessCenter,
   DirectionsWalk,
   Toys,
   MusicNote,
@@ -47,6 +46,7 @@ import { VoiceInputButton } from '@/components/voice/VoiceInputButton';
 import { FormSkeleton, ActivityListSkeleton } from '@/components/common/LoadingSkeletons';
 import { motion } from 'framer-motion';
 import { useLocalizedDate } from '@/hooks/useLocalizedDate';
+import { useTranslation } from '@/hooks/useTranslation';
 
 interface ActivityData {
   activityType: string;
@@ -58,6 +58,7 @@ function ActivityTrackPage() {
   const router = useRouter();
   const { user } = useAuth();
   const { formatDistanceToNow } = useLocalizedDate();
+  const { t } = useTranslation('tracking');
   const [children, setChildren] = useState<Child[]>([]);
   const [selectedChild, setSelectedChild] = useState<string>('');
 
@@ -160,7 +161,7 @@ function ActivityTrackPage() {
         notes: notes || undefined,
       });
 
-      setSuccessMessage('Activity logged successfully!');
+      setSuccessMessage(t('activity.success'));
 
       // Reset form
       resetForm();
@@ -193,7 +194,7 @@ function ActivityTrackPage() {
     try {
       setLoading(true);
       await trackingApi.deleteActivity(activityToDelete);
-      setSuccessMessage('Activity deleted successfully');
+      setSuccessMessage(t('activity.deleted'));
       setDeleteDialogOpen(false);
       setActivityToDelete(null);
       await loadRecentActivities();
@@ -211,8 +212,6 @@ function ActivityTrackPage() {
         return <Toys />;
       case 'walk':
         return <DirectionsWalk />;
-      case 'exercise':
-        return <FitnessCenter />;
       case 'music':
         return <MusicNote />;
       default:
@@ -238,13 +237,13 @@ function ActivityTrackPage() {
         <AppShell>
           <Box>
             <Typography variant="h4" fontWeight="600" sx={{ mb: 3 }}>
-              Track Activity
+              {t('trackActivity')}
             </Typography>
             <Paper sx={{ p: 3, mb: 3 }}>
               <FormSkeleton />
             </Paper>
             <Typography variant="h6" fontWeight="600" sx={{ mb: 2 }}>
-              Recent Activities
+              {t('activity.recentActivities')}
             </Typography>
             <ActivityListSkeleton count={3} />
           </Box>
@@ -261,17 +260,17 @@ function ActivityTrackPage() {
             <CardContent sx={{ textAlign: 'center', py: 8 }}>
               <ChildCare sx={{ fontSize: 64, color: 'text.secondary', mb: 2 }} />
               <Typography variant="h6" color="text.secondary" gutterBottom>
-                No Children Added
+                {t('common.noChildrenAdded')}
               </Typography>
               <Typography variant="body2" color="text.secondary" sx={{ mb: 3 }}>
-                You need to add a child before you can track activities
+                {t('common.noChildrenMessage')}
               </Typography>
               <Button
                 variant="contained"
                 startIcon={<Add />}
                 onClick={() => router.push('/children')}
               >
-                Add Child
+                {t('common.addChild')}
               </Button>
             </CardContent>
           </Card>
@@ -289,7 +288,7 @@ function ActivityTrackPage() {
               <ArrowBack />
             </IconButton>
             <Typography variant="h4" fontWeight="600" sx={{ flex: 1 }}>
-              Track Activity
+              {t('trackActivity')}
             </Typography>
             <VoiceInputButton
               onTranscript={(transcript) => {
@@ -323,11 +322,11 @@ function ActivityTrackPage() {
             {children.length > 1 && (
               <Paper sx={{ p: 2, mb: 3 }}>
                 <FormControl fullWidth>
-                  <InputLabel>Select Child</InputLabel>
+                  <InputLabel>{t('common.selectChild')}</InputLabel>
                   <Select
                     value={selectedChild}
                     onChange={(e) => setSelectedChild(e.target.value)}
-                    label="Select Child"
+                    label={t('common.selectChild')}
                   >
                     {children.map((child) => (
                       <MenuItem key={child.id} value={child.id}>
@@ -344,56 +343,55 @@ function ActivityTrackPage() {
               <Box sx={{ display: 'flex', alignItems: 'center', mb: 3 }}>
                 <ChildCare sx={{ fontSize: 36, color: 'success.main', mr: 2 }} />
                 <Typography variant="h6" fontWeight="600">
-                  Activity Information
+                  {t('activity.title')}
                 </Typography>
               </Box>
 
               <FormControl fullWidth sx={{ mb: 3 }}>
-                <InputLabel>Activity Type</InputLabel>
+                <InputLabel>{t('activity.type')}</InputLabel>
                 <Select
                   value={activityType}
                   onChange={(e) => setActivityType(e.target.value)}
-                  label="Activity Type"
+                  label={t('activity.type')}
                 >
-                  <MenuItem value="play">Play</MenuItem>
-                  <MenuItem value="walk">Walk</MenuItem>
-                  <MenuItem value="exercise">Exercise</MenuItem>
-                  <MenuItem value="music">Music</MenuItem>
-                  <MenuItem value="reading">Reading</MenuItem>
-                  <MenuItem value="tummy_time">Tummy Time</MenuItem>
-                  <MenuItem value="outdoor">Outdoor</MenuItem>
-                  <MenuItem value="other">Other</MenuItem>
+                  <MenuItem value="play">{t('activity.types.play')}</MenuItem>
+                  <MenuItem value="walk">{t('activity.types.walk')}</MenuItem>
+                  <MenuItem value="music">{t('activity.types.music')}</MenuItem>
+                  <MenuItem value="reading">{t('activity.types.reading')}</MenuItem>
+                  <MenuItem value="tummy_time">{t('activity.types.tummyTime')}</MenuItem>
+                  <MenuItem value="outdoor">{t('activity.types.outdoor')}</MenuItem>
+                  <MenuItem value="other">{t('activity.types.other')}</MenuItem>
                 </Select>
               </FormControl>
 
               <TextField
                 fullWidth
-                label="Duration (minutes, optional)"
+                label={t('activity.duration')}
                 type="number"
                 value={duration}
                 onChange={(e) => setDuration(e.target.value)}
                 sx={{ mb: 3 }}
-                placeholder="e.g., 30"
+                placeholder={t('activity.placeholders.duration')}
               />
 
               <TextField
                 fullWidth
-                label="Description (optional)"
+                label={t('activity.description')}
                 value={description}
                 onChange={(e) => setDescription(e.target.value)}
                 sx={{ mb: 3 }}
-                placeholder="e.g., Playing with blocks, Reading stories"
+                placeholder={t('activity.placeholders.description')}
               />
 
               <TextField
                 fullWidth
-                label="Notes (optional)"
+                label={t('activity.notes')}
                 multiline
                 rows={3}
                 value={notes}
                 onChange={(e) => setNotes(e.target.value)}
                 sx={{ mb: 3 }}
-                placeholder="Any additional notes..."
+                placeholder={t('activity.placeholders.notes')}
               />
 
               <Button
@@ -405,7 +403,7 @@ function ActivityTrackPage() {
                 onClick={handleSubmit}
                 disabled={loading}
               >
-                {loading ? 'Saving...' : 'Save Activity'}
+                {loading ? t('common.loading') : t('activity.logActivity')}
               </Button>
             </Paper>
 
@@ -413,7 +411,7 @@ function ActivityTrackPage() {
             <Paper sx={{ p: 3 }}>
               <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', mb: 2 }}>
                 <Typography variant="h6" fontWeight="600">
-                  Recent Activities
+                  {t('activity.recentActivities')}
                 </Typography>
                 <IconButton onClick={loadRecentActivities} disabled={activitiesLoading}>
                   <Refresh />
@@ -427,7 +425,7 @@ function ActivityTrackPage() {
               ) : recentActivities.length === 0 ? (
                 <Box sx={{ textAlign: 'center', py: 4 }}>
                   <Typography variant="body2" color="text.secondary">
-                    No activities yet
+                    {t('noEntries')}
                   </Typography>
                 </Box>
               ) : (
@@ -498,18 +496,18 @@ function ActivityTrackPage() {
           open={deleteDialogOpen}
           onClose={() => setDeleteDialogOpen(false)}
         >
-          <DialogTitle>Delete Activity?</DialogTitle>
+          <DialogTitle>{t('common.delete')} {t('activity.title')}?</DialogTitle>
           <DialogContent>
             <DialogContentText>
-              Are you sure you want to delete this activity? This action cannot be undone.
+              {t('confirmDelete')}
             </DialogContentText>
           </DialogContent>
           <DialogActions>
             <Button onClick={() => setDeleteDialogOpen(false)} disabled={loading}>
-              Cancel
+              {t('common.cancel')}
             </Button>
             <Button onClick={handleDeleteConfirm} color="error" disabled={loading}>
-              {loading ? 'Deleting...' : 'Delete'}
+              {loading ? 'Deleting...' : t('common.delete')}
             </Button>
           </DialogActions>
         </Dialog>
diff --git a/maternal-web/app/track/diaper/page.tsx b/maternal-web/app/track/diaper/page.tsx
index 0a05e29..5ea3caf 100644
--- a/maternal-web/app/track/diaper/page.tsx
+++ b/maternal-web/app/track/diaper/page.tsx
@@ -254,7 +254,7 @@ export default function DiaperTrackPage() {
         notes: notes || undefined,
       });
 
-      setSuccessMessage('Diaper change logged successfully!');
+      setSuccessMessage(t('diaper.success'));
 
       // Reset form
       resetForm();
@@ -289,7 +289,7 @@ export default function DiaperTrackPage() {
     try {
       setLoading(true);
       await trackingApi.deleteActivity(activityToDelete);
-      setSuccessMessage('Diaper change deleted successfully');
+      setSuccessMessage(t('diaper.deleted'));
       setDeleteDialogOpen(false);
       setActivityToDelete(null);
       await loadRecentDiapers();
@@ -333,8 +333,8 @@ export default function DiaperTrackPage() {
 
   const getDiaperDetails = (activity: Activity) => {
     const data = activity.data as DiaperData;
-    const typeLabel = data.diaperType.charAt(0).toUpperCase() + data.diaperType.slice(1);
-    const conditionsLabel = data.conditions?.join(', ') || '';
+    const typeLabel = t(`diaper.types.${data.diaperType}`);
+    const conditionsLabel = data.conditions?.map(c => t(`diaper.conditions.${c}`)).join(', ') || '';
 
     let details = typeLabel;
     if (conditionsLabel) {
@@ -342,7 +342,7 @@ export default function DiaperTrackPage() {
     }
 
     if (data.hasRash) {
-      details += ` - Rash (${data.rashSeverity})`;
+      details += ` - ${t('diaper.rash.title')} (${t(`diaper.rash.severities.${data.rashSeverity}`)})`;
     }
 
     return details;
@@ -390,17 +390,17 @@ export default function DiaperTrackPage() {
             <CardContent sx={{ textAlign: 'center', py: 8 }}>
               <ChildCare sx={{ fontSize: 64, color: 'text.secondary', mb: 2 }} />
               <Typography variant="h6" color="text.secondary" gutterBottom>
-                No Children Added
+                {t('common.noChildrenAdded')}
               </Typography>
               <Typography variant="body2" color="text.secondary" sx={{ mb: 3 }}>
-                You need to add a child before you can track diaper changes
+                {t('common.noChildrenMessage')}
               </Typography>
               <Button
                 variant="contained"
                 startIcon={<Add />}
                 onClick={() => router.push('/children')}
               >
-                Add Child
+                {t('common.addChild')}
               </Button>
             </CardContent>
           </Card>
@@ -437,11 +437,11 @@ export default function DiaperTrackPage() {
             {children.length > 1 && (
               <Paper sx={{ p: 2, mb: 3 }}>
                 <FormControl fullWidth>
-                  <InputLabel>Select Child</InputLabel>
+                  <InputLabel>{t('common.selectChild')}</InputLabel>
                   <Select
                     value={selectedChild}
                     onChange={(e) => setSelectedChild(e.target.value)}
-                    label="Select Child"
+                    label={t('common.selectChild')}
                   >
                     {children.map((child) => (
                       <MenuItem key={child.id} value={child.id}>
@@ -474,7 +474,7 @@ export default function DiaperTrackPage() {
                     InputLabelProps={{ shrink: true }}
                   />
                   <Button variant="outlined" onClick={setTimeNow} sx={{ minWidth: 100 }}>
-                    Now
+                    {t('diaper.now')}
                   </Button>
                 </Box>
               </Box>
@@ -524,13 +524,13 @@ export default function DiaperTrackPage() {
               {/* Condition Selector */}
               <Box sx={{ mb: 3 }}>
                 <Typography variant="subtitle1" fontWeight="600" sx={{ mb: 1 }}>
-                  Condition (select all that apply)
+                  {t('diaper.conditions.title')}
                 </Typography>
                 <Box sx={{ display: 'flex', flexWrap: 'wrap', gap: 1 }}>
                   {availableConditions.map((condition) => (
                     <Chip
                       key={condition}
-                      label={condition.charAt(0).toUpperCase() + condition.slice(1)}
+                      label={t(`diaper.conditions.${condition}`)}
                       onClick={() => handleConditionToggle(condition)}
                       color={conditions.includes(condition) ? 'primary' : 'default'}
                       variant={conditions.includes(condition) ? 'filled' : 'outlined'}
@@ -542,14 +542,14 @@ export default function DiaperTrackPage() {
 
               {/* Rash Indicator */}
               <FormControl fullWidth sx={{ mb: 3 }}>
-                <InputLabel>Diaper Rash?</InputLabel>
+                <InputLabel>{t('diaper.rash.title')}</InputLabel>
                 <Select
                   value={hasRash ? 'yes' : 'no'}
                   onChange={(e) => setHasRash(e.target.value === 'yes')}
-                  label="Diaper Rash?"
+                  label={t('diaper.rash.title')}
                 >
-                  <MenuItem value="no">No</MenuItem>
-                  <MenuItem value="yes">Yes</MenuItem>
+                  <MenuItem value="no">{t('diaper.rash.no')}</MenuItem>
+                  <MenuItem value="yes">{t('diaper.rash.yes')}</MenuItem>
                 </Select>
               </FormControl>
 
@@ -558,19 +558,19 @@ export default function DiaperTrackPage() {
                 <Box sx={{ mb: 3 }}>
                   <Alert severity="warning" sx={{ mb: 2 }}>
                     <Typography variant="body2" sx={{ mb: 1 }}>
-                      Diaper rash detected. Consider applying diaper rash cream and consulting your pediatrician if it persists.
+                      {t('diaper.rash.alert')}
                     </Typography>
                   </Alert>
                   <FormControl fullWidth>
-                    <InputLabel>Rash Severity</InputLabel>
+                    <InputLabel>{t('diaper.rash.severity')}</InputLabel>
                     <Select
                       value={rashSeverity}
                       onChange={(e) => setRashSeverity(e.target.value as 'mild' | 'moderate' | 'severe')}
-                      label="Rash Severity"
+                      label={t('diaper.rash.severity')}
                     >
-                      <MenuItem value="mild">Mild</MenuItem>
-                      <MenuItem value="moderate">Moderate</MenuItem>
-                      <MenuItem value="severe">Severe</MenuItem>
+                      <MenuItem value="mild">{t('diaper.rash.severities.mild')}</MenuItem>
+                      <MenuItem value="moderate">{t('diaper.rash.severities.moderate')}</MenuItem>
+                      <MenuItem value="severe">{t('diaper.rash.severities.severe')}</MenuItem>
                     </Select>
                   </FormControl>
                 </Box>
@@ -606,7 +606,7 @@ export default function DiaperTrackPage() {
             <Paper sx={{ p: 3 }}>
               <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', mb: 2 }}>
                 <Typography variant="h6" fontWeight="600">
-                  {t('diaper.title')}
+                  {t('diaper.recentDiapers')}
                 </Typography>
                 <IconButton onClick={loadRecentDiapers} disabled={diapersLoading}>
                   <Refresh />
@@ -646,10 +646,10 @@ export default function DiaperTrackPage() {
                               <Box sx={{ flex: 1 }}>
                                 <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, mb: 0.5, flexWrap: 'wrap' }}>
                                   <Typography variant="body1" fontWeight="600">
-                                    Diaper Change
+                                    {t('diaper.title')}
                                   </Typography>
                                   <Chip
-                                    label={data.diaperType.charAt(0).toUpperCase() + data.diaperType.slice(1)}
+                                    label={t(`diaper.types.${data.diaperType}`)}
                                     size="small"
                                     sx={{
                                       bgcolor: getDiaperTypeColor(data.diaperType),
@@ -659,7 +659,7 @@ export default function DiaperTrackPage() {
                                   {data.hasRash && (
                                     <Chip
                                       icon={<Warning sx={{ fontSize: 16 }} />}
-                                      label={`Rash: ${data.rashSeverity}`}
+                                      label={`${t('diaper.rash.title')}: ${t(`diaper.rash.severities.${data.rashSeverity}`)}`}
                                       size="small"
                                       color={getRashSeverityColor(data.rashSeverity || 'mild') as any}
                                     />
@@ -714,10 +714,10 @@ export default function DiaperTrackPage() {
           </DialogContent>
           <DialogActions>
             <Button onClick={() => setDeleteDialogOpen(false)} disabled={loading}>
-              Cancel
+              {t('common.cancel')}
             </Button>
             <Button onClick={handleDeleteConfirm} color="error" disabled={loading}>
-              {loading ? t('deleteEntry') : t('deleteEntry')}
+              {loading ? t('common.delete') : t('common.delete')}
             </Button>
           </DialogActions>
         </Dialog>
diff --git a/maternal-web/app/track/sleep/page.tsx b/maternal-web/app/track/sleep/page.tsx
index 4bde11b..579174d 100644
--- a/maternal-web/app/track/sleep/page.tsx
+++ b/maternal-web/app/track/sleep/page.tsx
@@ -230,7 +230,7 @@ export default function SleepTrackPage() {
         notes: notes || undefined,
       });
 
-      setSuccessMessage('Sleep logged successfully!');
+      setSuccessMessage(t('sleep.success'));
 
       // Reset form
       resetForm();
@@ -265,7 +265,7 @@ export default function SleepTrackPage() {
     try {
       setLoading(true);
       await trackingApi.deleteActivity(activityToDelete);
-      setSuccessMessage('Sleep deleted successfully');
+      setSuccessMessage(t('sleep.deleted'));
       setDeleteDialogOpen(false);
       setActivityToDelete(null);
       await loadRecentSleeps();
@@ -314,7 +314,7 @@ export default function SleepTrackPage() {
     const duration = data.endTime
       ? formatDuration(data.startTime, data.endTime)
       : data.isOngoing
-        ? `Ongoing - ${formatDuration(data.startTime)}`
+        ? t('sleep.ongoing_duration', { duration: formatDuration(data.startTime) })
         : 'No end time';
 
     return `${duration} - ${data.location.charAt(0).toUpperCase() + data.location.slice(1)}`;
@@ -349,17 +349,17 @@ export default function SleepTrackPage() {
             <CardContent sx={{ textAlign: 'center', py: 8 }}>
               <ChildCare sx={{ fontSize: 64, color: 'text.secondary', mb: 2 }} />
               <Typography variant="h6" color="text.secondary" gutterBottom>
-                No Children Added
+                {t('common.noChildrenAdded')}
               </Typography>
               <Typography variant="body2" color="text.secondary" sx={{ mb: 3 }}>
-                You need to add a child before you can track sleep activities
+                {t('common.noChildrenMessage')}
               </Typography>
               <Button
                 variant="contained"
                 startIcon={<Add />}
                 onClick={() => router.push('/children')}
               >
-                Add Child
+                {t('common.addChild')}
               </Button>
             </CardContent>
           </Card>
@@ -396,11 +396,11 @@ export default function SleepTrackPage() {
             {children.length > 1 && (
               <Paper sx={{ p: 2, mb: 3 }}>
                 <FormControl fullWidth>
-                  <InputLabel>Select Child</InputLabel>
+                  <InputLabel>{t('common.selectChild')}</InputLabel>
                   <Select
                     value={selectedChild}
                     onChange={(e) => setSelectedChild(e.target.value)}
-                    label="Select Child"
+                    label={t('common.selectChild')}
                   >
                     {children.map((child) => (
                       <MenuItem key={child.id} value={child.id}>
@@ -428,7 +428,7 @@ export default function SleepTrackPage() {
                     InputLabelProps={{ shrink: true }}
                   />
                   <Button variant="outlined" onClick={setStartNow} sx={{ minWidth: 100 }}>
-                    Now
+                    {t('sleep.now')}
                   </Button>
                 </Box>
               </Box>
@@ -436,14 +436,14 @@ export default function SleepTrackPage() {
               {/* Ongoing Checkbox */}
               <Box sx={{ mb: 3 }}>
                 <FormControl fullWidth>
-                  <InputLabel>Sleep Status</InputLabel>
+                  <InputLabel>{t('sleep.status.title')}</InputLabel>
                   <Select
                     value={isOngoing ? 'ongoing' : 'completed'}
                     onChange={(e) => setIsOngoing(e.target.value === 'ongoing')}
-                    label="Sleep Status"
+                    label={t('sleep.status.title')}
                   >
-                    <MenuItem value="completed">Completed (has end time)</MenuItem>
-                    <MenuItem value="ongoing">Ongoing (still sleeping)</MenuItem>
+                    <MenuItem value="completed">{t('sleep.status.completed')}</MenuItem>
+                    <MenuItem value="ongoing">{t('sleep.status.ongoing')}</MenuItem>
                   </Select>
                 </FormControl>
               </Box>
@@ -463,7 +463,7 @@ export default function SleepTrackPage() {
                       InputLabelProps={{ shrink: true }}
                     />
                     <Button variant="outlined" onClick={setEndNow} sx={{ minWidth: 100 }}>
-                      Now
+                      {t('sleep.now')}
                     </Button>
                   </Box>
                 </Box>
@@ -473,7 +473,7 @@ export default function SleepTrackPage() {
               {calculateDuration() && (
                 <Box sx={{ mb: 3, textAlign: 'center' }}>
                   <Chip
-                    label={`Duration: ${calculateDuration()}`}
+                    label={`${t('sleep.duration')}: ${calculateDuration()}`}
                     color="primary"
                     sx={{ fontSize: '1rem', py: 3 }}
                   />
@@ -497,17 +497,17 @@ export default function SleepTrackPage() {
 
               {/* Location */}
               <FormControl fullWidth sx={{ mb: 3 }}>
-                <InputLabel>Location</InputLabel>
+                <InputLabel>{t('sleep.location')}</InputLabel>
                 <Select
                   value={location}
                   onChange={(e) => setLocation(e.target.value)}
-                  label="Location"
+                  label={t('sleep.location')}
                 >
-                  <MenuItem value="crib">Crib</MenuItem>
-                  <MenuItem value="bed">Bed</MenuItem>
-                  <MenuItem value="stroller">Stroller</MenuItem>
-                  <MenuItem value="carrier">Carrier</MenuItem>
-                  <MenuItem value="other">Other</MenuItem>
+                  <MenuItem value="crib">{t('sleep.locations.crib')}</MenuItem>
+                  <MenuItem value="bed">{t('sleep.locations.bed')}</MenuItem>
+                  <MenuItem value="stroller">{t('sleep.locations.stroller')}</MenuItem>
+                  <MenuItem value="carrier">{t('sleep.locations.carrier')}</MenuItem>
+                  <MenuItem value="other">{t('sleep.locations.other')}</MenuItem>
                 </Select>
               </FormControl>
 
@@ -533,7 +533,7 @@ export default function SleepTrackPage() {
                 onClick={handleSubmit}
                 disabled={loading}
               >
-                {loading ? t('sleep.addSleep') : t('sleep.addSleep')}
+                {loading ? t('sleep.logSleep') : t('sleep.logSleep')}
               </Button>
             </Paper>
 
@@ -541,7 +541,7 @@ export default function SleepTrackPage() {
             <Paper sx={{ p: 3 }}>
               <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', mb: 2 }}>
                 <Typography variant="h6" fontWeight="600">
-                  {t('sleep.title')}
+                  {t('sleep.recentSleeps')}
                 </Typography>
                 <IconButton onClick={loadRecentSleeps} disabled={sleepsLoading}>
                   <Refresh />
@@ -581,7 +581,7 @@ export default function SleepTrackPage() {
                               <Box sx={{ flex: 1 }}>
                                 <Box sx={{ display: 'flex', alignItems: 'center', gap: 1, mb: 0.5, flexWrap: 'wrap' }}>
                                   <Typography variant="body1" fontWeight="600">
-                                    Sleep
+                                    {t('sleep.title')}
                                   </Typography>
                                   <Chip
                                     label={data.quality.charAt(0).toUpperCase() + data.quality.slice(1)}
@@ -638,10 +638,10 @@ export default function SleepTrackPage() {
           </DialogContent>
           <DialogActions>
             <Button onClick={() => setDeleteDialogOpen(false)} disabled={loading}>
-              Cancel
+              {t('common.cancel')}
             </Button>
             <Button onClick={handleDeleteConfirm} color="error" disabled={loading}>
-              {loading ? t('deleteEntry') : t('deleteEntry')}
+              {loading ? t('common.delete') : t('common.delete')}
             </Button>
           </DialogActions>
         </Dialog>
diff --git a/maternal-web/locales/en/settings.json b/maternal-web/locales/en/settings.json
index d197659..a6c492d 100644
--- a/maternal-web/locales/en/settings.json
+++ b/maternal-web/locales/en/settings.json
@@ -106,8 +106,42 @@
     "rateApp": "Rate App",
     "shareApp": "Share App"
   },
-  "save": "Save Changes",
-  "saved": "Settings saved successfully",
+  "profile": {
+    "title": "Profile Information",
+    "name": "Name",
+    "nameRequired": "Name cannot be empty",
+    "email": "Email",
+    "emailNotEditable": "Email cannot be changed"
+  },
+  "appearance": {
+    "title": "Appearance",
+    "darkMode": "Dark Mode (Coming Soon)"
+  },
+  "security": {
+    "title": "Security"
+  },
+  "sessions": {
+    "title": "Sessions"
+  },
+  "deviceTrust": {
+    "title": "Device Trust"
+  },
+  "biometric": {
+    "title": "Biometric Authentication"
+  },
+  "dataExport": {
+    "title": "Data Export"
+  },
+  "accountDeletion": {
+    "title": "Account Deletion"
+  },
+  "accountActions": {
+    "title": "Account Actions",
+    "logout": "Logout"
+  },
+  "save": "Save Preferences",
+  "saving": "Saving...",
+  "saved": "Settings saved successfully!",
   "cancel": "Cancel",
   "reset": "Reset to Default"
 }
diff --git a/maternal-web/locales/en/tracking.json b/maternal-web/locales/en/tracking.json
index d5ace66..9154043 100644
--- a/maternal-web/locales/en/tracking.json
+++ b/maternal-web/locales/en/tracking.json
@@ -42,6 +42,7 @@
   "sleep": {
     "title": "Sleep",
     "addSleep": "Add Sleep",
+    "logSleep": "Log Sleep",
     "startTime": "Sleep Start",
     "endTime": "Sleep End",
     "duration": "Duration",
@@ -52,14 +53,33 @@
       "good": "Good",
       "excellent": "Excellent"
     },
+    "location": "Location",
+    "locations": {
+      "crib": "Crib",
+      "bed": "Bed",
+      "stroller": "Stroller",
+      "carrier": "Carrier",
+      "other": "Other"
+    },
+    "status": {
+      "title": "Sleep Status",
+      "completed": "Completed (has end time)",
+      "ongoing": "Ongoing (still sleeping)"
+    },
+    "now": "Now",
     "notes": "Notes",
     "placeholders": {
       "notes": "Add any notes about this sleep session..."
-    }
+    },
+    "recentSleeps": "Recent Sleeps",
+    "success": "Sleep logged successfully!",
+    "deleted": "Sleep deleted successfully",
+    "ongoing_duration": "Ongoing - {{duration}}"
   },
   "diaper": {
     "title": "Diaper",
     "addDiaper": "Add Diaper Change",
+    "logDiaper": "Log Diaper Change",
     "type": "Type",
     "types": {
       "wet": "Wet",
@@ -68,10 +88,35 @@
       "dry": "Dry"
     },
     "time": "Time",
+    "now": "Now",
+    "conditions": {
+      "title": "Conditions",
+      "normal": "Normal",
+      "soft": "Soft",
+      "hard": "Hard",
+      "watery": "Watery",
+      "mucus": "Mucus",
+      "blood": "Blood"
+    },
+    "rash": {
+      "title": "Has Rash",
+      "yes": "Yes",
+      "no": "No",
+      "severity": "Rash Severity",
+      "alert": "Diaper rash detected. Consider applying diaper rash cream and consulting your pediatrician if it persists.",
+      "severities": {
+        "mild": "Mild",
+        "moderate": "Moderate",
+        "severe": "Severe"
+      }
+    },
     "notes": "Notes",
     "placeholders": {
       "notes": "Add any notes about this diaper change..."
-    }
+    },
+    "recentDiapers": "Recent Diaper Changes",
+    "success": "Diaper change logged successfully!",
+    "deleted": "Diaper change deleted successfully"
   },
   "milestone": {
     "title": "Milestone",
@@ -123,6 +168,42 @@
       "fahrenheit": "°F"
     }
   },
+  "activity": {
+    "title": "Activity",
+    "addActivity": "Add Activity",
+    "logActivity": "Log Activity",
+    "type": "Activity Type",
+    "types": {
+      "play": "Play",
+      "tummyTime": "Tummy Time",
+      "walk": "Walk",
+      "music": "Music",
+      "reading": "Reading",
+      "outdoor": "Outdoor Play",
+      "other": "Other"
+    },
+    "duration": "Duration (minutes)",
+    "description": "Description",
+    "notes": "Notes",
+    "placeholders": {
+      "duration": "Enter duration in minutes",
+      "description": "Describe the activity...",
+      "notes": "Add any notes..."
+    },
+    "recentActivities": "Recent Activities",
+    "success": "Activity logged successfully!",
+    "deleted": "Activity deleted successfully"
+  },
+  "common": {
+    "selectChild": "Select Child",
+    "cancel": "Cancel",
+    "delete": "Delete",
+    "loading": "Loading...",
+    "noChildrenAdded": "No Children Added",
+    "noChildrenMessage": "You need to add a child before you can track activities",
+    "addChild": "Add Child",
+    "recentActivities": "Recent Activities"
+  },
   "quickLog": "Quick Log",
   "viewHistory": "View History",
   "editEntry": "Edit Entry",
diff --git a/maternal-web/public/sw.js b/maternal-web/public/sw.js
index 66ba634..c1e5038 100644
--- a/maternal-web/public/sw.js
+++ b/maternal-web/public/sw.js
@@ -1 +1 @@
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