diff --git a/website/src/lib/assets/layers.ts b/website/src/lib/assets/layers.ts
index edd1fab1..8f2defa2 100644
--- a/website/src/lib/assets/layers.ts
+++ b/website/src/lib/assets/layers.ts
@@ -384,13 +384,13 @@ export const basemapTree: LayerTreeType = {
             bulgaria: ['bgMountains'],
             finland: ['finlandTopo'],
             france: ['ignPlanV2', 'ignFrScan25', 'ignSatellite'],
-            newZealand: ['linz', 'linzTopo'],
+            new_zealand: ['linz', 'linzTopo'],
             norway: ['norwayTopo'],
             spain: ['ignEs'],
             sweden: ['swedenTopo'],
             switzerland: ['swisstopo'],
-            unitedKingdom: ['ordnanceSurvey'],
-            unitedStates: ['usgs'],
+            united_kingdom: ['ordnanceSurvey'],
+            united_states: ['usgs'],
         },
     },
 }
@@ -399,7 +399,7 @@ export const overlayTree: LayerTreeType = {
     overlays: {
         world: {
             cyclOSM: ['cyclOSMlite'],
-            waymarkedTrails: ['waymarkedTrailsHiking', 'waymarkedTrailsCycling', 'waymarkedTrailsMTB', 'waymarkedTrailsSkating', 'waymarkedTrailsHorseRiding', 'waymarkedTrailsWinter']
+            waymarked_trails: ['waymarkedTrailsHiking', 'waymarkedTrailsCycling', 'waymarkedTrailsMTB', 'waymarkedTrailsSkating', 'waymarkedTrailsHorseRiding', 'waymarkedTrailsWinter']
         },
         countries: {
             france: ['ignFrCadastre', 'ignSlope'],
diff --git a/website/src/lib/components/Map.svelte b/website/src/lib/components/Map.svelte
index 2398f12a..32261336 100644
--- a/website/src/lib/components/Map.svelte
+++ b/website/src/lib/components/Map.svelte
@@ -8,6 +8,8 @@
 	import '@mapbox/mapbox-gl-geocoder/dist/mapbox-gl-geocoder.css';
 
 	import { map, settings } from '$lib/stores';
+	import { locale } from 'svelte-i18n';
+	import { get } from 'svelte/store';
 
 	mapboxgl.accessToken =
 		'pk.eyJ1IjoiZ3B4c3R1ZGlvIiwiYSI6ImNrdHVoM2pjNTBodmUycG1yZTNwcnJ3MzkifQ.YZnNs9s9oCQPzoXAWs_SLg';
@@ -54,7 +56,7 @@
 			style: { version: 8, sources: {}, layers: [] },
 			projection: { name: 'mercator' },
 			hash: true,
-			language: 'auto',
+			language: get(locale),
 			attributionControl: false,
 			logoPosition: 'bottom-right',
 			boxZoom: false
@@ -73,7 +75,8 @@
 				accessToken: mapboxgl.accessToken,
 				mapboxgl: mapboxgl,
 				collapsed: true,
-				flyTo: fitBoundsOptions
+				flyTo: fitBoundsOptions,
+				language: get(locale)
 			})
 		);
 
diff --git a/website/src/lib/components/Menu.svelte b/website/src/lib/components/Menu.svelte
index 148e3bd7..3c3a15ad 100644
--- a/website/src/lib/components/Menu.svelte
+++ b/website/src/lib/components/Menu.svelte
@@ -49,112 +49,112 @@
 					</Menubar.Item>
 					<Menubar.Separator />
 					<Menubar.Item on:click={triggerFileInput}>
-						<Upload size="16" class="mr-1" /> Load from desktop... <Menubar.Shortcut
-							>⌘O</Menubar.Shortcut
-						>
+						<Upload size="16" class="mr-1" />
+						{$_('menu.load_desktop')}
+						<Menubar.Shortcut>⌘O</Menubar.Shortcut>
 					</Menubar.Item>
 					<Menubar.Item>
 						<Cloud size="16" class="mr-1" />
-						Load from Google Drive...</Menubar.Item
+						{$_('menu.load_drive')}</Menubar.Item
 					>
 					<Menubar.Separator />
 					<Menubar.Item on:click={duplicateSelectedFiles} disabled={$selectedFiles.size == 0}>
-						<Copy size="16" class="mr-1" /> Duplicate <Menubar.Shortcut>⌘D</Menubar.Shortcut>
+						<Copy size="16" class="mr-1" />
+						{$_('menu.duplicate')}
+						<Menubar.Shortcut>⌘D</Menubar.Shortcut>
 					</Menubar.Item>
 					<Menubar.Separator />
 					<Menubar.Item on:click={exportSelectedFiles} disabled={$selectedFiles.size == 0}>
-						<Download size="16" class="mr-1" /> Export... <Menubar.Shortcut>⌘S</Menubar.Shortcut>
+						<Download size="16" class="mr-1" />
+						{$_('menu.export')}
+						<Menubar.Shortcut>⌘S</Menubar.Shortcut>
 					</Menubar.Item>
 					<Menubar.Item on:click={exportAllFiles} disabled={$fileCollection.files.length == 0}>
-						<Download size="16" class="mr-1" /> Export all... <Menubar.Shortcut
-							>⇧⌘S</Menubar.Shortcut
-						>
+						<Download size="16" class="mr-1" />
+						{$_('menu.export_all')}
+						<Menubar.Shortcut>⇧⌘S</Menubar.Shortcut>
 					</Menubar.Item>
 				</Menubar.Content>
 			</Menubar.Menu>
 			<Menubar.Menu>
-				<Menubar.Trigger>Edit</Menubar.Trigger>
+				<Menubar.Trigger>{$_('menu.edit')}</Menubar.Trigger>
 				<Menubar.Content>
 					<Menubar.Item>
-						<Undo2 size="16" class="mr-1" /> Undo <Menubar.Shortcut>⌘Z</Menubar.Shortcut>
+						<Undo2 size="16" class="mr-1" />
+						{$_('menu.undo')}
+						<Menubar.Shortcut>⌘Z</Menubar.Shortcut>
 					</Menubar.Item>
 					<Menubar.Item>
-						<Redo2 size="16" class="mr-1" /> Redo <Menubar.Shortcut>⇧⌘Z</Menubar.Shortcut>
+						<Redo2 size="16" class="mr-1" />
+						{$_('menu.redo')}
+						<Menubar.Shortcut>⇧⌘Z</Menubar.Shortcut>
 					</Menubar.Item>
 					<Menubar.Separator />
 					<Menubar.Item on:click={removeSelectedFiles} disabled={$selectedFiles.size == 0}>
-						<Trash2 size="16" class="mr-1" /> Delete <Menubar.Shortcut>⌘⌫</Menubar.Shortcut
-						></Menubar.Item
+						<Trash2 size="16" class="mr-1" />
+						{$_('menu.delete')}
+						<Menubar.Shortcut>⌘⌫</Menubar.Shortcut></Menubar.Item
 					>
 					<Menubar.Item
 						class="text-destructive data-[highlighted]:text-destructive"
 						on:click={removeAllFiles}
 						disabled={$fileCollection.files.length == 0}
 					>
-						<Trash2 size="16" class="mr-1" /> Delete all<Menubar.Shortcut>⇧⌘⌫</Menubar.Shortcut
-						></Menubar.Item
+						<Trash2 size="16" class="mr-1" />
+						{$_('menu.delete_all')}<Menubar.Shortcut>⇧⌘⌫</Menubar.Shortcut></Menubar.Item
 					>
 				</Menubar.Content>
 			</Menubar.Menu>
 			<Menubar.Menu>
-				<Menubar.Trigger>Help</Menubar.Trigger>
-				<Menubar.Content>
-					<Menubar.Item>
-						Quick help <Menubar.Shortcut>⌘H</Menubar.Shortcut>
-					</Menubar.Item>
-					<Menubar.Item>User guide</Menubar.Item>
-				</Menubar.Content>
-			</Menubar.Menu>
-			<Menubar.Menu>
-				<Menubar.Trigger>Settings</Menubar.Trigger>
+				<Menubar.Trigger>{$_('menu.settings')}</Menubar.Trigger>
 				<Menubar.Content
 					><Menubar.Sub>
-						<Menubar.SubTrigger inset>Distance units</Menubar.SubTrigger>
+						<Menubar.SubTrigger inset>{$_('menu.distance_units')}</Menubar.SubTrigger>
 						<Menubar.SubContent>
 							<Menubar.RadioGroup bind:value={$settings.distanceUnits}>
-								<Menubar.RadioItem value="metric">Metric</Menubar.RadioItem>
-								<Menubar.RadioItem value="imperial">Imperial</Menubar.RadioItem>
+								<Menubar.RadioItem value="metric">{$_('menu.metric')}</Menubar.RadioItem>
+								<Menubar.RadioItem value="imperial">{$_('menu.imperial')}</Menubar.RadioItem>
 							</Menubar.RadioGroup>
 						</Menubar.SubContent>
 					</Menubar.Sub>
 					<Menubar.Sub>
-						<Menubar.SubTrigger inset>Velocity units</Menubar.SubTrigger>
+						<Menubar.SubTrigger inset>{$_('menu.velocity_units')}</Menubar.SubTrigger>
 						<Menubar.SubContent>
 							<Menubar.RadioGroup bind:value={$settings.velocityUnits}>
-								<Menubar.RadioItem value="speed">Speed</Menubar.RadioItem>
-								<Menubar.RadioItem value="pace">Pace</Menubar.RadioItem>
+								<Menubar.RadioItem value="speed">{$_('quantities.speed')}</Menubar.RadioItem>
+								<Menubar.RadioItem value="pace">{$_('quantities.pace')}</Menubar.RadioItem>
 							</Menubar.RadioGroup>
 						</Menubar.SubContent>
 					</Menubar.Sub>
 					<Menubar.Sub>
-						<Menubar.SubTrigger inset>Temperature units</Menubar.SubTrigger>
+						<Menubar.SubTrigger inset>{$_('menu.temperature_units')}</Menubar.SubTrigger>
 						<Menubar.SubContent>
 							<Menubar.RadioGroup bind:value={$settings.temperatureUnits}>
-								<Menubar.RadioItem value="celsius">Celsius</Menubar.RadioItem>
-								<Menubar.RadioItem value="fahrenheit">Fahrenheit</Menubar.RadioItem>
+								<Menubar.RadioItem value="celsius">{$_('menu.celsius')}</Menubar.RadioItem>
+								<Menubar.RadioItem value="fahrenheit">{$_('menu.fahrenheit')}</Menubar.RadioItem>
 							</Menubar.RadioGroup>
 						</Menubar.SubContent>
 					</Menubar.Sub>
 					<Menubar.Separator />
 					<Menubar.CheckboxItem bind:checked={showDistanceMarkers}>
-						Show distance markers
+						{$_('menu.distance_markers')}
 					</Menubar.CheckboxItem>
 					<Menubar.CheckboxItem bind:checked={showDirectionMarkers}>
-						Show direction markers
+						{$_('menu.direction_markers')}
 					</Menubar.CheckboxItem>
 				</Menubar.Content>
 			</Menubar.Menu>
 		</Menubar.Root>
 		<div class="h-fit flex flex-row items-center ml-1 gap-1">
 			<Button variant="ghost" href="/about" target="_blank" class="cursor-default h-fit rounded-sm"
-				>About</Button
+				>{$_('menu.about')}</Button
 			>
 			<Button
 				variant="ghost"
 				href="https://ko-fi.com/gpxstudio"
 				target="_blank"
 				class="cursor-default h-fit rounded-sm"
-				>Donate <HeartHandshake size="16" class="ml-1" /></Button
+				>{$_('menu.donate')} <HeartHandshake size="16" class="ml-1" /></Button
 			>
 		</div>
 	</div>
diff --git a/website/src/lib/components/layer-control/LayerControlSettings.svelte b/website/src/lib/components/layer-control/LayerControlSettings.svelte
index f69691c5..5f445bd1 100644
--- a/website/src/lib/components/layer-control/LayerControlSettings.svelte
+++ b/website/src/lib/components/layer-control/LayerControlSettings.svelte
@@ -17,25 +17,26 @@
 		opacities,
 		defaultBasemap
 	} from '$lib/assets/layers';
+
+	import { _ } from 'svelte-i18n';
 </script>
 
 <Sheet.Root>
 	<Sheet.Trigger class="w-full">
 		<Button variant="ghost" class="w-full px-1 py-1.5">
 			<Settings size="18" class="mr-2" />
-			Manage layers
+			{$_('layers.manage')}
 		</Button>
 	</Sheet.Trigger>
 	<Sheet.Content>
 		<Sheet.Header class="h-full">
-			<Sheet.Title>Layer settings</Sheet.Title>
+			<Sheet.Title>{$_('layers.settings')}</Sheet.Title>
 			<Sheet.Description>
-				Select the map layers you want to show in the interface, add custom ones, and adjust their
-				settings.
+				{$_('layers.settings_help')}
 			</Sheet.Description>
 			<Accordion.Root class="flex flex-col overflow-hidden">
 				<Accordion.Item value="item-1" class="flex flex-col overflow-hidden">
-					<Accordion.Trigger>Layer selection</Accordion.Trigger>
+					<Accordion.Trigger>{$_('layers.selection')}</Accordion.Trigger>
 					<Accordion.Content class="grow flex flex-col border rounded">
 						<ScrollArea class="py-2 pr-2">
 							<LayerTree
@@ -61,17 +62,17 @@
 					</Accordion.Content>
 				</Accordion.Item>
 				<Accordion.Item value="item-2">
-					<Accordion.Trigger>Custom layers</Accordion.Trigger>
+					<Accordion.Trigger>{$_('layers.custom_layers')}</Accordion.Trigger>
 					<Accordion.Content>
 						<ScrollArea>TODO custom layer list + new custom layer form</ScrollArea>
 					</Accordion.Content>
 				</Accordion.Item>
 				<Accordion.Item value="item-3">
-					<Accordion.Trigger>Heatmap</Accordion.Trigger>
+					<Accordion.Trigger>{$_('layers.heatmap')}</Accordion.Trigger>
 					<Accordion.Content></Accordion.Content>
 				</Accordion.Item>
 				<Accordion.Item value="item-4">
-					<Accordion.Trigger>Points of interest</Accordion.Trigger>
+					<Accordion.Trigger>{$_('layers.pois')}</Accordion.Trigger>
 					<Accordion.Content></Accordion.Content>
 				</Accordion.Item>
 			</Accordion.Root>
diff --git a/website/src/lib/components/layer-control/LayerTreeNode.svelte b/website/src/lib/components/layer-control/LayerTreeNode.svelte
index 0b7e3c53..6a3fe383 100644
--- a/website/src/lib/components/layer-control/LayerTreeNode.svelte
+++ b/website/src/lib/components/layer-control/LayerTreeNode.svelte
@@ -8,6 +8,8 @@
 
 	import { type CollapsedInfoTreeType, type LayerTreeType } from '$lib/assets/layers';
 
+	import { _ } from 'svelte-i18n';
+
 	export let name: string;
 	export let node: LayerTreeType;
 	export let multiple: boolean = false;
@@ -60,7 +62,7 @@
 						}}
 					/>
 				{/if}
-				<Label for={id}>{id}</Label>
+				<Label for={id}>{$_(`layers.label.${id}`)}</Label>
 			</div>
 		{/each}
 	</div>
@@ -73,7 +75,7 @@
 						variant="ghost"
 						class="w-full flex flex-row justify-between py-0 px-1 h-fit hover:bg-background"
 					>
-						<span class="mr-2">{id}</span>
+						<span class="mr-2">{$_(`layers.label.${id}`)}</span>
 						{#if open.children[id].self}
 							<ChevronUp size="16" />
 						{:else}
diff --git a/website/src/lib/components/toolbar/Toolbar.svelte b/website/src/lib/components/toolbar/Toolbar.svelte
index 0eb45f5a..d1ddd63a 100644
--- a/website/src/lib/components/toolbar/Toolbar.svelte
+++ b/website/src/lib/components/toolbar/Toolbar.svelte
@@ -15,6 +15,8 @@
 		FolderTree
 	} from 'lucide-svelte';
 
+	import { _ } from 'svelte-i18n';
+
 	let currentTool: string | null = null;
 
 	function getToggleTool(tool: string) {
@@ -33,45 +35,43 @@
 		>
 			<ToolbarItem on:click={getToggleTool('routing')}>
 				<Pencil slot="icon" size="18" />
-				<span slot="tooltip">Edit the track points</span>
+				<span slot="tooltip">{$_('toolbar.routing_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<CalendarClock slot="icon" size="18" />
-				<span slot="tooltip">Change time and speed data</span>
+				<span slot="tooltip">{$_('toolbar.time_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem on:click={reverseSelectedFiles}>
 				<ArrowRightLeft slot="icon" size="18" />
-				<span slot="tooltip">Reverse the file</span>
+				<span slot="tooltip">{$_('toolbar.reverse_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<Group slot="icon" size="18" />
-				<span slot="tooltip">Merge with another file</span>
+				<span slot="tooltip">{$_('toolbar.merge_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<Ungroup slot="icon" size="18" />
-				<span slot="tooltip">Extract the tracks or track segments to new files</span>
+				<span slot="tooltip">{$_('toolbar.extract_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<MapPin slot="icon" size="18" />
-				<span slot="tooltip">Create a new point of interest</span>
+				<span slot="tooltip">{$_('toolbar.waypoint_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<Shrink slot="icon" size="18" />
-				<span slot="tooltip">Reduce the number of track points</span>
+				<span slot="tooltip">{$_('toolbar.reduce_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<SquareDashedMousePointer slot="icon" size="18" />
-				<span slot="tooltip"
-					>Clean track points and points of interest with a rectangle selection</span
-				>
+				<span slot="tooltip">{$_('toolbar.clean_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<Palette slot="icon" size="18" />
-				<span slot="tooltip">Change the styling of the trace</span>
+				<span slot="tooltip">{$_('toolbar.style_tooltip')}</span>
 			</ToolbarItem>
 			<ToolbarItem>
 				<FolderTree slot="icon" size="18" />
-				<span slot="tooltip">Manage the file structure</span>
+				<span slot="tooltip">{$_('toolbar.structure_tooltip')}</span>
 			</ToolbarItem>
 		</div>
 		{#if currentTool == 'routing'}
diff --git a/website/src/locales/en.json b/website/src/locales/en.json
index 3fdc666e..993b2db5 100644
--- a/website/src/locales/en.json
+++ b/website/src/locales/en.json
@@ -1,7 +1,98 @@
 {
     "menu": {
         "file": "File",
-        "new": "New"
+        "new": "New",
+        "load_desktop": "Load from desktop...",
+        "load_drive": "Load from Google Drive...",
+        "duplicate": "Duplicate",
+        "export": "Export...",
+        "export_all": "Export all...",
+        "edit": "Edit",
+        "undo": "Undo",
+        "redo": "Redo",
+        "delete": "Delete",
+        "delete_all": "Delete all",
+        "settings": "Settings",
+        "distance_units": "Distance units",
+        "metric": "Metric",
+        "imperial": "Imperial",
+        "velocity_units": "Velocity units",
+        "temperature_units": "Temperature units",
+        "celsius": "Celsius",
+        "fahrenheit": "Fahrenheit",
+        "distance_markers": "Show distance markers",
+        "direction_markers": "Show direction markers",
+        "about": "About",
+        "donate": "Donate"
+    },
+    "toolbar": {
+        "routing_tooltip": "Edit the route",
+        "time_tooltip": "Change the time and speed data",
+        "reverse_tooltip": "Reverse the direction",
+        "merge_tooltip": "Merge files together",
+        "extract_tooltip": "Extract inner tracks or segments",
+        "waypoint_tooltip": "Create a new point of interest",
+        "reduce_tooltip": "Reduce the number of points",
+        "clean_tooltip": "Clean track points and points of interest with a rectangle selection",
+        "style_tooltip": "Change the style of the route",
+        "structure_tooltip": "Manage the file structure"
+    },
+    "layers": {
+        "manage": "Manage layers",
+        "settings": "Layer settings",
+        "settings_help": "Select the map layers you want to show in the interface, add custom ones, and adjust their settings.",
+        "selection": "Layer selection",
+        "custom_layers": "Custom layers",
+        "heatmap": "Heatmap",
+        "pois": "Points of interest",
+        "label": {
+            "basemaps": "Basemaps",
+            "overlays": "Overlays",
+            "world": "World",
+            "countries": "Countries",
+            "bulgaria": "Bulgaria",
+            "finland": "Finland",
+            "france": "France",
+            "new_zealand": "New Zealand",
+            "norway": "Norway",
+            "spain": "Spain",
+            "sweden": "Sweden",
+            "switzerland": "Switzerland",
+            "united_kingdom": "United Kingdom",
+            "united_states": "United States",
+            "mapboxOutdoors": "Mapbox Outdoors",
+            "mapboxSatellite": "Mapbox Satellite",
+            "openStreetMap": "OpenStreetMap",
+            "openTopoMap": "OpenTopoMap",
+            "openHikingMap": "OpenHikingMap",
+            "cyclOSM": "CyclOSM",
+            "linz": "LINZ Topo",
+            "linzTopo": "LINZ Topo50",
+            "swisstopo": "swisstopo",
+            "ignPlanV2": "IGN Plan",
+            "ignFrScan25": "IGN SCAN25",
+            "ignSatellite": "IGN Satellite",
+            "ignEs": "IGN",
+            "ordnanceSurvey": "Ordnance Survey",
+            "norwayTopo": "Topografisk Norgeskart 4",
+            "swedenTopo": "Lantmäteriet Topo",
+            "finlandTopo": "Lantmäteriverket Terrängkarta",
+            "bgMountains": "BGMountains",
+            "usgs": "USGS",
+            "cyclOSMlite": "CyclOSM Lite",
+            "swisstopoSlope": "swisstopo Slope",
+            "swisstopoCycling": "swisstopo Cycling",
+            "swisstopoMountainBike": "swisstopo MTB",
+            "ignFrCadastre": "IGN Cadastre",
+            "ignSlope": "IGN Slope",
+            "waymarked_trails": "Waymarked Trails",
+            "waymarkedTrailsHiking": "Hiking",
+            "waymarkedTrailsCycling": "Cycling",
+            "waymarkedTrailsMTB": "MTB",
+            "waymarkedTrailsSkating": "Skating",
+            "waymarkedTrailsHorseRiding": "Horse Riding",
+            "waymarkedTrailsWinter": "Winter"
+        }
     },
     "quantities": {
         "distance": "Distance",