diff --git a/src/client/components/CategoryFilterDropdown.tsx b/src/client/components/CategoryFilterDropdown.tsx
index b2bd1ee..ffacdf4 100644
--- a/src/client/components/CategoryFilterDropdown.tsx
+++ b/src/client/components/CategoryFilterDropdown.tsx
@@ -1,4 +1,5 @@
 import { useEffect, useRef, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { LucideIcon } from "../lib/iconData";
 
 interface CategoryFilterDropdownProps {
@@ -12,6 +13,7 @@ export function CategoryFilterDropdown({
 	onChange,
 	categories,
 }: CategoryFilterDropdownProps) {
+	const { t } = useTranslation("collection");
 	const [isOpen, setIsOpen] = useState(false);
 	const [searchText, setSearchText] = useState("");
 	const containerRef = useRef<HTMLDivElement>(null);
@@ -81,7 +83,7 @@ export function CategoryFilterDropdown({
 						<span className="text-gray-900">{selectedCategory.name}</span>
 					</>
 				) : (
-					<span className="text-gray-600">All categories</span>
+					<span className="text-gray-600">{t("categoryFilter.allCategories")}</span>
 				)}
 				{selectedCategory ? (
 					<button
@@ -131,7 +133,7 @@ export function CategoryFilterDropdown({
 						<input
 							ref={searchInputRef}
 							type="text"
-							placeholder="Search categories..."
+							placeholder={t("categoryFilter.searchPlaceholder")}
 							value={searchText}
 							onChange={(e) => setSearchText(e.target.value)}
 							className="w-full px-2.5 py-1.5 border border-gray-200 rounded text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
@@ -153,7 +155,7 @@ export function CategoryFilterDropdown({
 											: "text-gray-700"
 									}`}
 								>
-									All categories
+									{t("categoryFilter.allCategories")}
 								</button>
 							</li>
 						)}
@@ -187,7 +189,7 @@ export function CategoryFilterDropdown({
 								"all categories".includes(searchText.toLowerCase())
 							) && (
 								<li className="px-3 py-2 text-sm text-gray-400">
-									No categories found
+									{t("categoryFilter.noResults")}
 								</li>
 							)}
 					</ul>
diff --git a/src/client/components/CategoryHeader.tsx b/src/client/components/CategoryHeader.tsx
index 2b64943..dc9b7a0 100644
--- a/src/client/components/CategoryHeader.tsx
+++ b/src/client/components/CategoryHeader.tsx
@@ -1,4 +1,5 @@
 import { useState } from "react";
+import { useTranslation } from "react-i18next";
 import { useDeleteCategory, useUpdateCategory } from "../hooks/useCategories";
 import { useFormatters } from "../hooks/useFormatters";
 import { LucideIcon } from "../lib/iconData";
@@ -21,6 +22,7 @@ export function CategoryHeader({
 	totalCost,
 	itemCount,
 }: CategoryHeaderProps) {
+	const { t } = useTranslation("collection");
 	const { weight, price } = useFormatters();
 	const [isEditing, setIsEditing] = useState(false);
 	const [editName, setEditName] = useState(name);
@@ -67,14 +69,14 @@ export function CategoryHeader({
 					onClick={handleSave}
 					className="text-sm text-gray-600 hover:text-gray-800 font-medium"
 				>
-					Save
+					{t("categoryHeader.save")}
 				</button>
 				<button
 					type="button"
 					onClick={() => setIsEditing(false)}
 					className="text-sm text-gray-400 hover:text-gray-600"
 				>
-					Cancel
+					{t("categoryHeader.cancel")}
 				</button>
 			</div>
 		);
@@ -85,7 +87,7 @@ export function CategoryHeader({
 			<LucideIcon name={icon} size={22} className="text-gray-500" />
 			<h2 className="text-lg font-semibold text-gray-900">{name}</h2>
 			<span className="text-sm text-gray-400">
-				{itemCount} {itemCount === 1 ? "item" : "items"} · {weight(totalWeight)}{" "}
+				{t("categoryHeader.itemCount", { count: itemCount })} · {weight(totalWeight)}{" "}
 				· {price(totalCost)}
 			</span>
 			{!isUncategorized && (
diff --git a/src/client/components/CategoryPicker.tsx b/src/client/components/CategoryPicker.tsx
index 095493c..5db366e 100644
--- a/src/client/components/CategoryPicker.tsx
+++ b/src/client/components/CategoryPicker.tsx
@@ -1,4 +1,5 @@
 import { useEffect, useRef, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { useCategories, useCreateCategory } from "../hooks/useCategories";
 import { LucideIcon } from "../lib/iconData";
 import { IconPicker } from "./IconPicker";
@@ -9,6 +10,7 @@ interface CategoryPickerProps {
 }
 
 export function CategoryPicker({ value, onChange }: CategoryPickerProps) {
+	const { t } = useTranslation("collection");
 	const { data: categories = [] } = useCategories();
 	const createCategory = useCreateCategory();
 	const [inputValue, setInputValue] = useState("");
@@ -158,7 +160,7 @@ export function CategoryPicker({ value, onChange }: CategoryPickerProps) {
 					value={
 						isOpen ? inputValue : selectedCategory ? selectedCategory.name : ""
 					}
-					placeholder="Search or create category..."
+					placeholder={t("categoryPicker.searchOrCreate")}
 					onChange={(e) => {
 						setInputValue(e.target.value);
 						setIsOpen(true);
@@ -233,14 +235,14 @@ export function CategoryPicker({ value, onChange }: CategoryPickerProps) {
 									disabled={createCategory.isPending}
 									className="text-xs font-medium text-gray-600 hover:text-gray-800 disabled:opacity-50"
 								>
-									{createCategory.isPending ? "..." : "Create"}
+									{createCategory.isPending ? "..." : t("categoryPicker.create")}
 								</button>
 							</div>
 						</li>
 					)}
 					{filtered.length === 0 && !showCreateOption && (
 						<li className="px-3 py-2 text-sm text-gray-400">
-							No categories found
+							{t("categoryPicker.noCategories")}
 						</li>
 					)}
 				</ul>
diff --git a/src/client/components/CollectionView.tsx b/src/client/components/CollectionView.tsx
index d764378..ec7f0de 100644
--- a/src/client/components/CollectionView.tsx
+++ b/src/client/components/CollectionView.tsx
@@ -1,4 +1,5 @@
 import { useMemo, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { useCategories } from "../hooks/useCategories";
 import { useFormatters } from "../hooks/useFormatters";
 import { useItems } from "../hooks/useItems";
@@ -10,6 +11,7 @@ import { CategoryHeader } from "./CategoryHeader";
 import { ItemCard } from "./ItemCard";
 
 export function CollectionView() {
+	const { t } = useTranslation(["collection", "common"]);
 	const { data: items, isLoading: itemsLoading } = useItems();
 	const { data: totals } = useTotals();
 	const { data: categories } = useCategories();
@@ -58,11 +60,10 @@ export function CollectionView() {
 						/>
 					</div>
 					<h2 className="text-xl font-semibold text-gray-900 mb-2">
-						Your collection is empty
+						{t("collection:empty.title")}
 					</h2>
 					<p className="text-sm text-gray-500 mb-6">
-						Start cataloging your gear by adding your first item. Track weight,
-						price, and organize by category.
+						{t("collection:empty.description")}
 					</p>
 					<button
 						type="button"
@@ -83,7 +84,7 @@ export function CollectionView() {
 								d="M12 4v16m8-8H4"
 							/>
 						</svg>
-						Add your first item
+						{t("collection:empty.addFirst")}
 					</button>
 				</div>
 			</div>
@@ -136,14 +137,14 @@ export function CollectionView() {
 					<div className="flex items-center gap-8">
 						<div className="flex flex-col items-center gap-1">
 							<LucideIcon name="layers" size={14} className="text-gray-400" />
-							<span className="text-xs text-gray-500">Items</span>
+							<span className="text-xs text-gray-500">{t("common:stats.items")}</span>
 							<span className="text-sm font-semibold text-gray-900">
 								{totals.global.itemCount}
 							</span>
 						</div>
 						<div className="flex flex-col items-center gap-1">
 							<LucideIcon name="weight" size={14} className="text-gray-400" />
-							<span className="text-xs text-gray-500">Total Weight</span>
+							<span className="text-xs text-gray-500">{t("common:stats.totalWeight")}</span>
 							<span className="text-sm font-semibold text-gray-900">
 								{weight(totals.global.totalWeight)}
 							</span>
@@ -154,7 +155,7 @@ export function CollectionView() {
 								size={14}
 								className="text-gray-400"
 							/>
-							<span className="text-xs text-gray-500">Total Spent</span>
+							<span className="text-xs text-gray-500">{t("common:stats.totalSpent")}</span>
 							<span className="text-sm font-semibold text-gray-900">
 								{price(totals.global.totalCost)}
 							</span>
@@ -169,7 +170,7 @@ export function CollectionView() {
 					<div className="relative flex-1">
 						<input
 							type="text"
-							placeholder="Search items..."
+							placeholder={t("common:filter.searchItems")}
 							value={searchText}
 							onChange={(e) => setSearchText(e.target.value)}
 							className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
@@ -204,7 +205,7 @@ export function CollectionView() {
 				</div>
 				{hasActiveFilters && (
 					<p className="text-xs text-gray-500 mt-2">
-						Showing {filteredItems.length} of {items.length} items
+						{t("common:filter.showing", { filtered: filteredItems.length, total: items.length })}
 					</p>
 				)}
 			</div>
@@ -213,7 +214,7 @@ export function CollectionView() {
 			{hasActiveFilters ? (
 				filteredItems.length === 0 ? (
 					<div className="py-12 text-center">
-						<p className="text-sm text-gray-500">No items match your search</p>
+						<p className="text-sm text-gray-500">{t("common:empty.noItems")}</p>
 					</div>
 				) : (
 					<div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
diff --git a/src/client/components/ItemCard.tsx b/src/client/components/ItemCard.tsx
index 009e908..14b0b72 100644
--- a/src/client/components/ItemCard.tsx
+++ b/src/client/components/ItemCard.tsx
@@ -1,4 +1,5 @@
 import { useNavigate } from "@tanstack/react-router";
+import { useTranslation } from "react-i18next";
 import { useFormatters } from "../hooks/useFormatters";
 import { useDuplicateItem } from "../hooks/useItems";
 import { LucideIcon } from "../lib/iconData";
@@ -51,6 +52,7 @@ export function ItemCard({
 	linkTo,
 	priceCurrency,
 }: ItemCardProps) {
+	const { t } = useTranslation("collection");
 	const { weight, price } = useFormatters();
 	const navigate = useNavigate();
 	const openExternalLink = useUIStore((s) => s.openExternalLink);
@@ -102,7 +104,7 @@ export function ItemCard({
 						}
 					}}
 					className={`absolute top-2 ${productUrl ? "right-10" : "right-2"} z-10 w-6 h-6 flex items-center justify-center rounded-full bg-gray-100/80 text-gray-400 hover:bg-blue-100 hover:text-blue-500 opacity-0 group-hover:opacity-100 transition-all cursor-pointer`}
-					title="Duplicate item"
+					title={t("itemCard.duplicateItem")}
 				>
 					<svg
 						className="w-3.5 h-3.5"
@@ -134,7 +136,7 @@ export function ItemCard({
 						}
 					}}
 					className={`absolute top-2 ${onRemove ? "right-10" : "right-2"} z-10 w-6 h-6 flex items-center justify-center rounded-full bg-gray-100/80 text-gray-400 hover:bg-gray-200 hover:text-gray-600 opacity-0 group-hover:opacity-100 transition-all cursor-pointer`}
-					title="Open product link"
+					title={t("itemCard.openProductLink")}
 				>
 					<svg
 						className="w-3.5 h-3.5"
@@ -166,7 +168,7 @@ export function ItemCard({
 						}
 					}}
 					className="absolute top-2 right-2 z-10 w-6 h-6 flex items-center justify-center rounded-full bg-gray-100/80 text-gray-400 hover:bg-red-100 hover:text-red-500 opacity-0 group-hover:opacity-100 transition-all cursor-pointer"
-					title="Remove from setup"
+					title={t("itemCard.removeFromSetup")}
 				>
 					<svg
 						className="w-3.5 h-3.5"
diff --git a/src/client/components/ItemForm.tsx b/src/client/components/ItemForm.tsx
index 51cef7f..96189af 100644
--- a/src/client/components/ItemForm.tsx
+++ b/src/client/components/ItemForm.tsx
@@ -1,4 +1,5 @@
 import { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { useCurrency } from "../hooks/useCurrency";
 import { useCreateItem, useItems, useUpdateItem } from "../hooks/useItems";
 import { useUIStore } from "../stores/uiStore";
@@ -34,6 +35,7 @@ const INITIAL_FORM: FormData = {
 };
 
 export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
+	const { t } = useTranslation(["collection", "common"]);
 	const { data: items } = useItems();
 	const { currency } = useCurrency();
 	const createItem = useCreateItem();
@@ -68,26 +70,26 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 	function validate(): boolean {
 		const newErrors: Record<string, string> = {};
 		if (!form.name.trim()) {
-			newErrors.name = "Name is required";
+			newErrors.name = t("common:errors.nameRequired");
 		}
 		if (
 			form.weightGrams &&
 			(Number.isNaN(Number(form.weightGrams)) || Number(form.weightGrams) < 0)
 		) {
-			newErrors.weightGrams = "Must be a positive number";
+			newErrors.weightGrams = t("common:errors.positiveNumber");
 		}
 		if (
 			form.priceDollars &&
 			(Number.isNaN(Number(form.priceDollars)) || Number(form.priceDollars) < 0)
 		) {
-			newErrors.priceDollars = "Must be a positive number";
+			newErrors.priceDollars = t("common:errors.positiveNumber");
 		}
 		if (
 			form.productUrl &&
 			form.productUrl.trim() !== "" &&
 			!form.productUrl.match(/^https?:\/\//)
 		) {
-			newErrors.productUrl = "Must be a valid URL (https://...)";
+			newErrors.productUrl = t("common:errors.validUrl");
 		}
 		setErrors(newErrors);
 		return Object.keys(newErrors).length === 0;
@@ -148,7 +150,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					htmlFor="item-name"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					Name *
+					{t("collection:form.nameRequired")}
 				</label>
 				<input
 					id="item-name"
@@ -156,7 +158,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					value={form.name}
 					onChange={(e) => setForm((f) => ({ ...f, name: e.target.value }))}
 					className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
-					placeholder="e.g. Osprey Talon 22"
+					placeholder={t("collection:form.namePlaceholder")}
 				/>
 				{errors.name && (
 					<p className="mt-1 text-xs text-red-500">{errors.name}</p>
@@ -169,7 +171,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					htmlFor="item-weight"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					Weight (g)
+					{t("collection:form.weight")}
 				</label>
 				<input
 					id="item-weight"
@@ -181,7 +183,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 						setForm((f) => ({ ...f, weightGrams: e.target.value }))
 					}
 					className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
-					placeholder="e.g. 680"
+					placeholder={t("collection:form.weightPlaceholder")}
 				/>
 				{errors.weightGrams && (
 					<p className="mt-1 text-xs text-red-500">{errors.weightGrams}</p>
@@ -194,7 +196,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					htmlFor="item-price"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					{`Price (${currency})`}
+					{`${t("collection:form.price")} (${currency})`}
 				</label>
 				<input
 					id="item-price"
@@ -206,7 +208,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 						setForm((f) => ({ ...f, priceDollars: e.target.value }))
 					}
 					className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
-					placeholder="e.g. 129.99"
+					placeholder={t("collection:form.pricePlaceholder")}
 				/>
 				{errors.priceDollars && (
 					<p className="mt-1 text-xs text-red-500">{errors.priceDollars}</p>
@@ -219,7 +221,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					htmlFor="item-quantity"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					Quantity
+					{t("collection:form.quantity")}
 				</label>
 				<input
 					id="item-quantity"
@@ -240,7 +242,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 			{/* Category */}
 			<div>
 				<label className="block text-sm font-medium text-gray-700 mb-1">
-					Category
+					{t("collection:form.category")}
 				</label>
 				<CategoryPicker
 					value={form.categoryId}
@@ -254,7 +256,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					htmlFor="item-notes"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					Notes
+					{t("collection:form.notes")}
 				</label>
 				<textarea
 					id="item-notes"
@@ -262,7 +264,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					onChange={(e) => setForm((f) => ({ ...f, notes: e.target.value }))}
 					rows={3}
 					className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent resize-none"
-					placeholder="Any additional notes..."
+					placeholder={t("collection:form.notesPlaceholder")}
 				/>
 			</div>
 
@@ -272,7 +274,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					htmlFor="item-url"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					Product Link
+					{t("collection:form.productLink")}
 				</label>
 				<input
 					id="item-url"
@@ -282,7 +284,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 						setForm((f) => ({ ...f, productUrl: e.target.value }))
 					}
 					className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
-					placeholder="https://..."
+					placeholder={t("collection:form.urlPlaceholder")}
 				/>
 				{errors.productUrl && (
 					<p className="mt-1 text-xs text-red-500">{errors.productUrl}</p>
@@ -297,10 +299,10 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 					className="flex-1 py-2.5 px-4 bg-gray-700 hover:bg-gray-800 disabled:opacity-50 text-white text-sm font-medium rounded-lg transition-colors"
 				>
 					{isPending
-						? "Saving..."
+						? t("common:actions.saving")
 						: mode === "add"
-							? "Add Item"
-							: "Save Changes"}
+							? t("common:actions.addItem")
+							: t("common:actions.saveChanges")}
 				</button>
 				{mode === "edit" && itemId != null && (
 					<button
@@ -308,7 +310,7 @@ export function ItemForm({ mode, itemId, onClose }: ItemFormProps) {
 						onClick={() => openConfirmDelete(itemId)}
 						className="py-2.5 px-4 text-red-600 hover:bg-red-50 text-sm font-medium rounded-lg transition-colors"
 					>
-						Delete
+						{t("common:actions.delete")}
 					</button>
 				)}
 			</div>
diff --git a/src/client/components/ItemPicker.tsx b/src/client/components/ItemPicker.tsx
index 0df4975..8892512 100644
--- a/src/client/components/ItemPicker.tsx
+++ b/src/client/components/ItemPicker.tsx
@@ -1,4 +1,5 @@
 import { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { useFormatters } from "../hooks/useFormatters";
 import { useItems } from "../hooks/useItems";
 import { useSyncSetupItems } from "../hooks/useSetups";
@@ -18,6 +19,7 @@ export function ItemPicker({
 	isOpen,
 	onClose,
 }: ItemPickerProps) {
+	const { t } = useTranslation(["collection", "common"]);
 	const { data: items } = useItems();
 	const syncItems = useSyncSetupItems(setupId);
 	const { weight, price } = useFormatters();
@@ -74,13 +76,13 @@ export function ItemPicker({
 	}
 
 	return (
-		<SlideOutPanel isOpen={isOpen} onClose={onClose} title="Select Items">
+		<SlideOutPanel isOpen={isOpen} onClose={onClose} title={t("collection:itemPicker.title")}>
 			<div className="flex flex-col h-full">
 				<div className="flex-1 overflow-y-auto -mx-6 px-6">
 					{!items || items.length === 0 ? (
 						<div className="py-8 text-center">
 							<p className="text-sm text-gray-500">
-								No items in your collection yet.
+								{t("collection:itemPicker.noItems")}
 							</p>
 						</div>
 					) : (
@@ -136,7 +138,7 @@ export function ItemPicker({
 						onClick={onClose}
 						className="flex-1 px-4 py-2 text-sm font-medium text-gray-700 bg-gray-100 hover:bg-gray-200 rounded-lg transition-colors"
 					>
-						Cancel
+						{t("common:actions.cancel")}
 					</button>
 					<button
 						type="button"
@@ -144,7 +146,7 @@ export function ItemPicker({
 						disabled={syncItems.isPending}
 						className="flex-1 px-4 py-2 text-sm font-medium text-white bg-gray-700 hover:bg-gray-800 disabled:opacity-50 rounded-lg transition-colors"
 					>
-						{syncItems.isPending ? "Saving..." : "Done"}
+						{syncItems.isPending ? t("common:actions.saving") : t("collection:itemPicker.done")}
 					</button>
 				</div>
 			</div>
diff --git a/src/client/components/LinkToGlobalItem.tsx b/src/client/components/LinkToGlobalItem.tsx
index fa5d22c..df80fa0 100644
--- a/src/client/components/LinkToGlobalItem.tsx
+++ b/src/client/components/LinkToGlobalItem.tsx
@@ -1,5 +1,6 @@
 import { Link } from "@tanstack/react-router";
 import { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
 import {
 	useGlobalItem,
 	useGlobalItems,
@@ -17,6 +18,7 @@ export function LinkToGlobalItem({
 	itemId,
 	linkedGlobalItemId,
 }: LinkToGlobalItemProps) {
+	const { t } = useTranslation("collection");
 	const [isOpen, setIsOpen] = useState(false);
 	const [searchInput, setSearchInput] = useState("");
 	const [debouncedQuery, setDebouncedQuery] = useState("");
@@ -85,7 +87,7 @@ export function LinkToGlobalItem({
 						disabled={unlinkItem.isPending}
 						className="text-xs text-gray-400 hover:text-red-500 transition-colors shrink-0"
 					>
-						{unlinkItem.isPending ? "..." : "Unlink"}
+						{unlinkItem.isPending ? "..." : t("linkToGlobal.unlink")}
 					</button>
 				</div>
 			</div>
@@ -113,7 +115,7 @@ export function LinkToGlobalItem({
 						d="M13.828 10.172a4 4 0 00-5.656 0l-4 4a4 4 0 105.656 5.656l1.102-1.101m-.758-4.899a4 4 0 005.656 0l4-4a4 4 0 00-5.656-5.656l-1.1 1.1"
 					/>
 				</svg>
-				Link to catalog
+				{t("linkToGlobal.linkToCatalog")}
 			</button>
 		);
 	}
@@ -124,7 +126,7 @@ export function LinkToGlobalItem({
 			<div className="p-3">
 				<div className="flex items-center justify-between mb-2">
 					<span className="text-xs font-medium text-gray-500">
-						Link to global catalog
+						{t("linkToGlobal.linkToGlobalCatalog")}
 					</span>
 					<button
 						type="button"
@@ -154,7 +156,7 @@ export function LinkToGlobalItem({
 					type="text"
 					value={searchInput}
 					onChange={(e) => setSearchInput(e.target.value)}
-					placeholder="Search by brand or model..."
+					placeholder={t("linkToGlobal.searchPlaceholder")}
 					className="w-full px-3 py-2 bg-gray-50 border border-gray-200 rounded-md text-sm text-gray-900 placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-gray-200 focus:border-gray-300"
 					autoFocus
 				/>
@@ -165,7 +167,7 @@ export function LinkToGlobalItem({
 				<div className="border-t border-gray-100 max-h-48 overflow-y-auto">
 					{isSearching ? (
 						<div className="p-3 text-center">
-							<span className="text-xs text-gray-400">Searching...</span>
+							<span className="text-xs text-gray-400">{t("linkToGlobal.searching")}</span>
 						</div>
 					) : searchResults && searchResults.length > 0 ? (
 						<div>
@@ -195,7 +197,7 @@ export function LinkToGlobalItem({
 						</div>
 					) : (
 						<div className="p-3 text-center">
-							<span className="text-xs text-gray-400">No items found</span>
+							<span className="text-xs text-gray-400">{t("linkToGlobal.noItemsFound")}</span>
 						</div>
 					)}
 				</div>
diff --git a/src/client/components/ManualEntryForm.tsx b/src/client/components/ManualEntryForm.tsx
index 8bf9890..8179136 100644
--- a/src/client/components/ManualEntryForm.tsx
+++ b/src/client/components/ManualEntryForm.tsx
@@ -1,4 +1,5 @@
 import { useEffect, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { useCategories } from "../hooks/useCategories";
 import { useCurrency } from "../hooks/useCurrency";
 import { useCreateItem } from "../hooks/useItems";
@@ -14,6 +15,7 @@ export function ManualEntryForm({
 	initialName,
 	onSuccess,
 }: ManualEntryFormProps) {
+	const { t } = useTranslation(["collection", "common"]);
 	const { data: categories } = useCategories();
 	const { currency } = useCurrency();
 	const createItem = useCreateItem();
@@ -39,11 +41,11 @@ export function ManualEntryForm({
 		e.preventDefault();
 
 		if (!name.trim()) {
-			setError("Name is required");
+			setError(t("collection:manualEntry.nameRequired"));
 			return;
 		}
 		if (categoryId === null) {
-			setError("Please select a category");
+			setError(t("collection:manualEntry.selectCategory"));
 			return;
 		}
 
@@ -69,7 +71,7 @@ export function ManualEntryForm({
 					onSuccess(item.name);
 				},
 				onError: (err) => {
-					setError(err instanceof Error ? err.message : "Failed to save");
+					setError(err instanceof Error ? err.message : t("collection:manualEntry.failedToSave"));
 				},
 			},
 		);
@@ -92,14 +94,14 @@ export function ManualEntryForm({
 						htmlFor="manual-name"
 						className="block text-sm font-medium text-gray-700 mb-1"
 					>
-						Name <span className="text-red-500">*</span>
+						{t("collection:form.name")} <span className="text-red-500">*</span>
 					</label>
 					<input
 						id="manual-name"
 						type="text"
 						value={name}
 						onChange={(e) => setName(e.target.value)}
-						placeholder="Item name"
+						placeholder={t("collection:manualEntry.namePlaceholder")}
 						required
 						className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm text-gray-900 placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
 					/>
@@ -108,7 +110,7 @@ export function ManualEntryForm({
 				{/* Category */}
 				<div>
 					<label className="block text-sm font-medium text-gray-700 mb-1">
-						Category
+						{t("collection:form.category")}
 					</label>
 					<CategoryPicker
 						value={categoryId ?? 0}
@@ -123,7 +125,7 @@ export function ManualEntryForm({
 							htmlFor="manual-weight"
 							className="block text-sm font-medium text-gray-700 mb-1"
 						>
-							Weight (g)
+							{t("collection:manualEntry.weightLabel")}
 						</label>
 						<input
 							id="manual-weight"
@@ -141,7 +143,7 @@ export function ManualEntryForm({
 							htmlFor="manual-price"
 							className="block text-sm font-medium text-gray-700 mb-1"
 						>
-							MSRP ($)
+							{t("collection:manualEntry.msrpLabel")}
 						</label>
 						<input
 							id="manual-price"
@@ -162,7 +164,7 @@ export function ManualEntryForm({
 						htmlFor="manual-purchase-price"
 						className="block text-sm font-medium text-gray-700 mb-1"
 					>
-						{`Purchase Price (${currency})`}
+						{`${t("collection:manualEntry.purchasePrice")} (${currency})`}
 					</label>
 					<input
 						id="manual-purchase-price"
@@ -182,14 +184,14 @@ export function ManualEntryForm({
 						htmlFor="manual-product-url"
 						className="block text-sm font-medium text-gray-700 mb-1"
 					>
-						Product Link
+						{t("collection:manualEntry.productLink")}
 					</label>
 					<input
 						id="manual-product-url"
 						type="url"
 						value={productUrl}
 						onChange={(e) => setProductUrl(e.target.value)}
-						placeholder="https://..."
+						placeholder={t("collection:form.urlPlaceholder")}
 						className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
 					/>
 				</div>
@@ -200,13 +202,13 @@ export function ManualEntryForm({
 						htmlFor="manual-notes"
 						className="block text-sm font-medium text-gray-700 mb-1"
 					>
-						Notes
+						{t("collection:manualEntry.notesLabel")}
 					</label>
 					<textarea
 						id="manual-notes"
 						value={notes}
 						onChange={(e) => setNotes(e.target.value)}
-						placeholder="Optional notes..."
+						placeholder={t("collection:manualEntry.optionalNotes")}
 						rows={3}
 						className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent resize-none"
 					/>
@@ -221,7 +223,7 @@ export function ManualEntryForm({
 					disabled={createItem.isPending || !name.trim() || categoryId === null}
 					className="w-full px-4 py-2.5 text-sm font-medium text-white bg-gray-900 rounded-lg hover:bg-gray-800 disabled:opacity-50 transition-colors"
 				>
-					{createItem.isPending ? "Saving..." : "Add to Collection"}
+					{createItem.isPending ? t("common:actions.saving") : t("collection:manualEntry.addToCollection")}
 				</button>
 			</form>
 		</div>
diff --git a/src/client/components/ProfileSection.tsx b/src/client/components/ProfileSection.tsx
index 37b50d8..903b3c6 100644
--- a/src/client/components/ProfileSection.tsx
+++ b/src/client/components/ProfileSection.tsx
@@ -1,9 +1,11 @@
 import { useEffect, useRef, useState } from "react";
+import { useTranslation } from "react-i18next";
 import { useAuth } from "../hooks/useAuth";
 import { usePublicProfile, useUpdateProfile } from "../hooks/useProfile";
 import { apiUpload } from "../lib/api";
 
 export function ProfileSection() {
+	const { t } = useTranslation(["collection", "common"]);
 	const { data: auth } = useAuth();
 	const userId = auth?.user?.id ?? null;
 	const { data: profile } = usePublicProfile(userId);
@@ -40,7 +42,7 @@ export function ProfileSection() {
 				bio: bio.trim() || undefined,
 			});
 			setDirty(false);
-			setMessage({ type: "success", text: "Profile updated" });
+			setMessage({ type: "success", text: t("profileSection.profileUpdated") });
 		} catch (err) {
 			setMessage({ type: "error", text: (err as Error).message });
 		}
@@ -56,12 +58,12 @@ export function ProfileSection() {
 		if (!accepted.includes(file.type)) {
 			setMessage({
 				type: "error",
-				text: "Please select a JPG, PNG, or WebP image.",
+				text: t("common:imageUpload.invalidType"),
 			});
 			return;
 		}
 		if (file.size > maxSize) {
-			setMessage({ type: "error", text: "Image must be under 5MB." });
+			setMessage({ type: "error", text: t("common:imageUpload.tooLarge") });
 			return;
 		}
 
@@ -75,7 +77,7 @@ export function ProfileSection() {
 			setDirty(true);
 		} catch {
 			setAvatarDisplayUrl(null);
-			setMessage({ type: "error", text: "Avatar upload failed." });
+			setMessage({ type: "error", text: t("collection:profileSection.avatarUploadFailed") });
 		} finally {
 			setUploading(false);
 			if (fileInputRef.current) fileInputRef.current.value = "";
@@ -85,9 +87,9 @@ export function ProfileSection() {
 	return (
 		<form onSubmit={handleSave} className="space-y-4">
 			<div>
-				<h3 className="text-sm font-medium text-gray-900">Profile</h3>
+				<h3 className="text-sm font-medium text-gray-900">{t("collection:profileSection.title")}</h3>
 				<p className="text-xs text-gray-500 mt-0.5">
-					Your public profile information
+					{t("collection:profileSection.subtitle")}
 				</p>
 			</div>
 
@@ -148,7 +150,7 @@ export function ProfileSection() {
 						disabled={uploading}
 						className="text-sm text-gray-600 hover:text-gray-800 transition-colors"
 					>
-						{uploading ? "Uploading..." : "Change avatar"}
+						{uploading ? t("collection:profileSection.uploadingAvatar") : t("collection:profileSection.changeAvatar")}
 					</button>
 					{avatarFilename && (
 						<button
@@ -160,7 +162,7 @@ export function ProfileSection() {
 							}}
 							className="block text-xs text-red-500 hover:text-red-700 mt-0.5"
 						>
-							Remove
+							{t("collection:profileSection.removeAvatar")}
 						</button>
 					)}
 				</div>
@@ -179,7 +181,7 @@ export function ProfileSection() {
 					htmlFor="displayName"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					Display Name
+					{t("collection:profileSection.displayName")}
 				</label>
 				<input
 					id="displayName"
@@ -201,7 +203,7 @@ export function ProfileSection() {
 					htmlFor="bio"
 					className="block text-sm font-medium text-gray-700 mb-1"
 				>
-					Bio
+					{t("collection:profileSection.bio")}
 				</label>
 				<textarea
 					id="bio"
@@ -233,7 +235,7 @@ export function ProfileSection() {
 				disabled={updateProfile.isPending}
 				className="px-4 py-2 text-sm font-medium text-white bg-gray-700 hover:bg-gray-800 disabled:opacity-50 rounded-lg transition-colors"
 			>
-				{updateProfile.isPending ? "Saving..." : "Save Profile"}
+				{updateProfile.isPending ? t("common:actions.saving") : t("collection:profileSection.saveProfile")}
 			</button>
 		</form>
 	);
diff --git a/src/client/components/WeightSummaryCard.tsx b/src/client/components/WeightSummaryCard.tsx
index ed4fa73..98e4b0c 100644
--- a/src/client/components/WeightSummaryCard.tsx
+++ b/src/client/components/WeightSummaryCard.tsx
@@ -7,6 +7,7 @@ import {
 	ResponsiveContainer,
 	Tooltip,
 } from "recharts";
+import { useTranslation } from "react-i18next";
 import { useFormatters } from "../hooks/useFormatters";
 import type { SetupItemWithCategory } from "../hooks/useSetups";
 import { formatWeight, type WeightUnit } from "../lib/formatters";
@@ -150,6 +151,7 @@ function LegendRow({
 }
 
 export function WeightSummaryCard({ items }: WeightSummaryCardProps) {
+	const { t } = useTranslation("collection");
 	const { unit } = useFormatters();
 	const [viewMode, setViewMode] = useState<ViewMode>("category");
 
@@ -192,9 +194,9 @@ export function WeightSummaryCard({ items }: WeightSummaryCardProps) {
 		return (
 			<div className="bg-white rounded-xl border border-gray-100 p-5 mb-6">
 				<h3 className="text-sm font-medium text-gray-700 mb-2">
-					Weight Summary
+					{t("weightSummary.title")}
 				</h3>
-				<p className="text-sm text-gray-400">No weight data to display</p>
+				<p className="text-sm text-gray-400">{t("weightSummary.noData")}</p>
 			</div>
 		);
 	}
@@ -203,7 +205,7 @@ export function WeightSummaryCard({ items }: WeightSummaryCardProps) {
 		<div className="bg-white rounded-xl border border-gray-100 p-5 mb-6">
 			{/* Header with pill toggle */}
 			<div className="flex items-center justify-between mb-4">
-				<h3 className="text-sm font-medium text-gray-700">Weight Summary</h3>
+				<h3 className="text-sm font-medium text-gray-700">{t("weightSummary.title")}</h3>
 				<div className="flex items-center gap-1 bg-gray-100 rounded-full px-1 py-0.5">
 					{VIEW_MODES.map((mode) => (
 						<button
@@ -216,7 +218,7 @@ export function WeightSummaryCard({ items }: WeightSummaryCardProps) {
 									: "text-gray-400 hover:text-gray-600"
 							}`}
 						>
-							{mode === "category" ? "Category" : "Classification"}
+							{mode === "category" ? t("weightSummary.category") : t("weightSummary.classification")}
 						</button>
 					))}
 				</div>
@@ -260,21 +262,21 @@ export function WeightSummaryCard({ items }: WeightSummaryCardProps) {
 				<div className="flex-1 flex flex-col justify-center min-w-0">
 					<LegendRow
 						color="#6b7280"
-						label="Base Weight"
+						label={t("weightSummary.baseWeight")}
 						weight={baseWeight}
 						unit={unit}
 						percent={totalWeight > 0 ? baseWeight / totalWeight : undefined}
 					/>
 					<LegendRow
 						color="#9ca3af"
-						label="Worn"
+						label={t("weightSummary.worn")}
 						weight={wornWeight}
 						unit={unit}
 						percent={totalWeight > 0 ? wornWeight / totalWeight : undefined}
 					/>
 					<LegendRow
 						color="#d1d5db"
-						label="Consumable"
+						label={t("weightSummary.consumable")}
 						weight={consumableWeight}
 						unit={unit}
 						percent={
@@ -289,7 +291,7 @@ export function WeightSummaryCard({ items }: WeightSummaryCardProps) {
 								className="text-gray-400 shrink-0 ml-0.5"
 							/>
 							<span className="text-sm font-medium text-gray-700 flex-1">
-								Total
+								{t("weightSummary.total")}
 							</span>
 							<span className="text-sm font-bold text-gray-900 tabular-nums">
 								{formatWeight(totalWeight, unit)}
diff --git a/src/client/locales/en/collection.json b/src/client/locales/en/collection.json
index 452a41f..1e11e7f 100644
--- a/src/client/locales/en/collection.json
+++ b/src/client/locales/en/collection.json
@@ -20,7 +20,11 @@
 		"notes": "Notes",
 		"notesPlaceholder": "Any additional notes...",
 		"productLink": "Product Link",
-		"urlPlaceholder": "https://..."
+		"urlPlaceholder": "https://...",
+		"msrp": "MSRP",
+		"purchasePrice": "Purchase Price",
+		"itemNamePlaceholder": "Item name",
+		"optionalNotes": "Optional notes..."
 	},
 	"classification": {
 		"ultralight": "Ultralight",
@@ -39,5 +43,73 @@
 		"base": "Base Weight",
 		"worn": "Worn",
 		"consumable": "Consumable"
+	},
+	"categoryPicker": {
+		"searchOrCreate": "Search or create category...",
+		"create": "Create",
+		"noCategories": "No categories found"
+	},
+	"categoryFilter": {
+		"allCategories": "All categories",
+		"searchPlaceholder": "Search categories...",
+		"noResults": "No categories found"
+	},
+	"weightSummary": {
+		"title": "Weight Summary",
+		"noData": "No weight data to display",
+		"baseWeight": "Base Weight",
+		"worn": "Worn",
+		"consumable": "Consumable",
+		"total": "Total",
+		"category": "Category",
+		"classification": "Classification"
+	},
+	"itemPicker": {
+		"title": "Select Items",
+		"noItems": "No items in your collection yet.",
+		"done": "Done"
+	},
+	"categoryHeader": {
+		"itemCount": "{{count}} items",
+		"itemCount_one": "{{count}} item",
+		"save": "Save",
+		"cancel": "Cancel"
+	},
+	"linkToGlobal": {
+		"linkToCatalog": "Link to catalog",
+		"linkToGlobalCatalog": "Link to global catalog",
+		"searching": "Searching...",
+		"noItemsFound": "No items found",
+		"unlink": "Unlink",
+		"searchPlaceholder": "Search by brand or model..."
+	},
+	"manualEntry": {
+		"namePlaceholder": "Item name",
+		"weightLabel": "Weight (g)",
+		"msrpLabel": "MSRP ($)",
+		"notesLabel": "Notes",
+		"optionalNotes": "Optional notes...",
+		"productLink": "Product Link",
+		"addToCollection": "Add to Collection",
+		"nameRequired": "Name is required",
+		"selectCategory": "Please select a category",
+		"failedToSave": "Failed to save"
+	},
+	"itemCard": {
+		"duplicateItem": "Duplicate item",
+		"openProductLink": "Open product link",
+		"removeFromSetup": "Remove from setup"
+	},
+	"profileSection": {
+		"title": "Profile",
+		"subtitle": "Your public profile information",
+		"changeAvatar": "Change avatar",
+		"removeAvatar": "Remove",
+		"uploadingAvatar": "Uploading...",
+		"displayName": "Display Name",
+		"bio": "Bio",
+		"saveProfile": "Save Profile",
+		"profileUpdated": "Profile updated",
+		"avatarUploadFailed": "Avatar upload failed."
 	}
 }