diff --git a/components/state-management/state-management-react/README.md b/components/state-management/state-management-react/README.md
new file mode 100644
index 0000000..95f302e
--- /dev/null
+++ b/components/state-management/state-management-react/README.md
@@ -0,0 +1,108 @@
+# State Management Core
+
+This package provides a simple interface for working with multiple reactive framworks.
+
+It assumes a view/view model architecture for your app. The view is responsible for what
+the user sees, and the view model is responsible for the stateful logic that makes the view
+operational.
+
+This package establishes a convention for writing a view model in vanilla JavaScript and
+your view in React, Svelte, or some other reactive framework.
+
+This package exists for view models that are exposed as libraries. Since your view model
+is not tied to a specific framework, developers can write their own views using their
+framework of choice.
+
+## Fields
+
+A field represents a single piece of reactive data. Its usage is best explained with an example.
+
+Suppose your app has a search bar. Every time the user changes the search text, the app
+should perform a search.
+
+Here's how you would define the search text field:
+
+```js
+const searchText = new Field("", (newSearchText) => {
+  // This callback runs whenever the user changes the search text.
+  searchFor(newSearchText);
+});
+
+// Get current value of the field
+let text = searchText.value;
+
+// Update the field and perform the search.
+// This is how the UI should update the field.
+searchText.requestUpdate("hello world");
+
+// Update the field without performing the search.
+// Your program can use this method internally to update the field without side effects.
+searchText.value = "abc";
+```
+
+## View Models
+
+In the context of this package, a view model is an object with fields.
+To define a view model, write a function like the following:
+
+```js
+function usePersonViewModel() {
+  // The view model can have fields...
+  const name = new Field();
+  const age = new Field();
+
+  // ...and actions
+  function haveBirthday() {
+    age.value++;
+  }
+
+  return { name, age, haveBirthday };
+}
+```
+
+## Usage in UI framework
+
+Framework-specific adapters make view models accessible to your UI. For example,
+if you framework is Svelte, use the `state-management-svelte` package:
+
+```svelte
+<script>
+import { svelteViewModel } from "@ethnolib/state-management-svelte";
+
+// svelteViewModel() turns all fields into reactive Svelte properties
+const person = svelteViewModel(usePersonViewModel())
+
+person.name = "John"  // Behind the scenes, this calls `requestUpdate`
+</script>
+
+<p>Hello, {person.name}!</p>
+```
+
+For more details, see documentation for `state-management-svelte` or the adapter for your
+framework of choice.
+
+Behind the scenes, the adapter does something like this to keep the view model in sync with the UI:
+
+```js
+const person = usePersonViewModel();
+
+// Replace `defineReactiveState` with your framework's mechanism
+const reactiveName = defineReactiveSate();
+
+/**
+ * Establish a two-way binding between `reactiveName` and `person.name`:
+ */
+
+// Update the UI in response to the field
+person.name.updateUI = (value) => {
+  reactiveName = value; // Or however you update reactiveName in your framework
+};
+
+// Update the field in response to the UI.
+// Replace `watch()` with whatever your framework uses to subscribe to a variable.
+watch(reactiveName, (value) => person.name.requestUpdate(value));
+
+/**
+ * Now your UI can use `reactiveName` to interact with the name field.
+ */
+```
diff --git a/components/state-management/state-management-react/index.ts b/components/state-management/state-management-react/index.ts
new file mode 100644
index 0000000..2925eb0
--- /dev/null
+++ b/components/state-management/state-management-react/index.ts
@@ -0,0 +1 @@
+export * from "./src/use-field";
diff --git a/components/state-management/state-management-react/package.json b/components/state-management/state-management-react/package.json
new file mode 100644
index 0000000..3270565
--- /dev/null
+++ b/components/state-management/state-management-react/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "@ethnolib/state-management-react",
+  "description": "An adapter to use @ethnolib/state-management-core with React",
+  "author": "SIL Global",
+  "license": "MIT",
+  "version": "0.1.0",
+  "main": "./index.js",
+  "types": "./index.d.ts",
+  "scripts": {
+    "build": "nx vite:build",
+    "typecheck": "tsc",
+    "test": "nx vite:test --config vitest.config.ts",
+    "testonce": "nx vite:test --config vitest.config.ts --run",
+    "lint": "eslint ."
+  },
+  "devDependencies": {
+    "@nx/vite": "^19.1.2",
+    "@types/react": "^17",
+    "@types/react-dom": "^17",
+    "@types/node": "^20.16.11",
+    "@vitejs/plugin-react-swc": "^3.8.0",
+    "tsx": "^4.19.2",
+    "typescript": "^5.2.2"
+  },
+  "volta": {
+    "extends": "../../../package.json"
+  }
+}
diff --git a/components/state-management/state-management-react/src/use-field.ts b/components/state-management/state-management-react/src/use-field.ts
new file mode 100644
index 0000000..2abbd59
--- /dev/null
+++ b/components/state-management/state-management-react/src/use-field.ts
@@ -0,0 +1,15 @@
+import { useState } from "react";
+import { Field } from "@ethnolib/state-management-core";
+
+export function useField<T>(field: Field<T>): [T, (value: T) => void] {
+  const [fieldValue, _setFieldValue] = useState(field.value);
+
+  function setFieldValue(value: T) {
+    field.requestUpdate(value);
+    _setFieldValue(value);
+  }
+
+  field.updateUI = (value) => _setFieldValue(value);
+
+  return [fieldValue, setFieldValue];
+}
diff --git a/components/state-management/state-management-react/tsconfig.json b/components/state-management/state-management-react/tsconfig.json
new file mode 100644
index 0000000..b2ec30c
--- /dev/null
+++ b/components/state-management/state-management-react/tsconfig.json
@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "jsx": "react-jsx",
+    "allowJs": false,
+    "esModuleInterop": false,
+    "allowSyntheticDefaultImports": true,
+    "strict": true
+  },
+  "ts-node": {
+    "moduleTypes": {
+      "*": "esm"
+    }
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.lib.json"
+    }
+  ],
+  "extends": "../../../tsconfig.base.json"
+}
diff --git a/components/state-management/state-management-react/tsconfig.lib.json b/components/state-management/state-management-react/tsconfig.lib.json
new file mode 100644
index 0000000..6c0f0ad
--- /dev/null
+++ b/components/state-management/state-management-react/tsconfig.lib.json
@@ -0,0 +1,28 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../../dist/out-tsc",
+    "types": ["node", "vite/client"],
+    "composite": true,
+    "declaration": true,
+    "declarationMap": true
+  },
+  "exclude": [
+    "langtagProcessing.ts",
+    "**/*.spec.ts",
+    "**/*.test.ts",
+    "**/*.spec.tsx",
+    "**/*.test.tsx",
+    "**/*.spec.js",
+    "**/*.test.js",
+    "**/*.spec.jsx",
+    "**/*.test.jsx"
+  ],
+  "include": [
+    "./**/*.js",
+    "./**/*.jsx",
+    "./**/*.ts",
+    "./**/*.tsx",
+    "../index.ts"
+  ]
+}
diff --git a/components/state-management/state-management-react/vite.config.ts b/components/state-management/state-management-react/vite.config.ts
new file mode 100644
index 0000000..e6bd7dd
--- /dev/null
+++ b/components/state-management/state-management-react/vite.config.ts
@@ -0,0 +1,36 @@
+/// <reference types='vitest' />
+import { defineConfig } from "vite";
+import dts from "vite-plugin-dts";
+import * as path from "path";
+import { nxViteTsPaths } from "@nx/vite/plugins/nx-tsconfig-paths.plugin";
+
+export default defineConfig({
+  root: __dirname,
+  cacheDir:
+    "../../../node_modules/.vite/components/state-management/state-management-core",
+
+  plugins: [
+    nxViteTsPaths(),
+    dts({
+      entryRoot: ".",
+      tsconfigPath: path.join(__dirname, "tsconfig.lib.json"),
+    }),
+  ],
+
+  // Configuration for building your library.
+  // See: https://vitejs.dev/guide/build.html#library-mode
+  build: {
+    outDir: "./dist",
+    emptyOutDir: true,
+    reportCompressedSize: true,
+    commonjsOptions: {
+      transformMixedEsModules: true,
+    },
+    lib: {
+      entry: "./index.ts",
+      name: "@ethnolib/find-language",
+      fileName: "index",
+      formats: ["es", "cjs"],
+    },
+  },
+});
diff --git a/components/state-management/state-management-react/vitest.config.ts b/components/state-management/state-management-react/vitest.config.ts
new file mode 100644
index 0000000..803a872
--- /dev/null
+++ b/components/state-management/state-management-react/vitest.config.ts
@@ -0,0 +1,10 @@
+/// <reference types="vitest" />
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  test: {
+    expect: {
+      requireAssertions: true,
+    },
+  },
+});
diff --git a/package-lock.json b/package-lock.json
index 4e1f6cc..10a0eb0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -622,6 +622,7 @@
     "components/language-chooser/svelte/language-chooser-svelte": {
       "name": "@ethnolib/language-chooser-svelte",
       "version": "0.0.1",
+      "extraneous": true,
       "devDependencies": {
         "@nx/vite": "^20.4.6",
         "@sveltejs/vite-plugin-svelte": "^6.1.4",
@@ -641,10 +642,32 @@
         "node": ">=18.18"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/@sveltejs/vite-plugin-svelte": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/@sveltejs/vite-plugin-svelte/-/vite-plugin-svelte-6.2.0.tgz",
-      "integrity": "sha512-nJsV36+o7rZUDlrnSduMNl11+RoDE1cKqOI0yUEBCcqFoAZOk47TwD3dPKS2WmRutke9StXnzsPBslY7prDM9w==",
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui": {
+      "name": "@ethnolib/language-chooser-svelte-daisyui",
+      "version": "0.0.1",
+      "devDependencies": {
+        "@nx/vite": "^20.4.6",
+        "@sveltejs/vite-plugin-svelte": "^6.1.4",
+        "@tailwindcss/postcss": "^4.1.13",
+        "@tailwindcss/typography": "^0.5.16",
+        "@tsconfig/svelte": "^5.0.0",
+        "autoprefixer": "^10.4.21",
+        "daisyui": "^5.1.12",
+        "eslint-plugin-svelte": "^2.44.0",
+        "postcss": "^8.5.6",
+        "svelte": "^5.38.6",
+        "svelte-check": "^4.0.5",
+        "svelte-preprocess": "^6.0.0",
+        "tailwindcss": "^3.4.17"
+      },
+      "engines": {
+        "node": ">=18.18"
+      }
+    },
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/@sveltejs/vite-plugin-svelte": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/@sveltejs/vite-plugin-svelte/-/vite-plugin-svelte-6.2.1.tgz",
+      "integrity": "sha512-YZs/OSKOQAQCnJvM/P+F1URotNnYNeU3P2s4oIpzm1uFaqUEqRxUB0g5ejMjEb5Gjb9/PiBI5Ktrq4rUUF8UVQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -662,7 +685,7 @@
         "vite": "^6.3.0 || ^7.0.0"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/@sveltejs/vite-plugin-svelte-inspector": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/@sveltejs/vite-plugin-svelte-inspector": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/@sveltejs/vite-plugin-svelte-inspector/-/vite-plugin-svelte-inspector-5.0.1.tgz",
       "integrity": "sha512-ubWshlMk4bc8mkwWbg6vNvCeT7lGQojE3ijDh3QTR6Zr/R+GXxsGbyH4PExEPpiFmqPhYiVSVmHBjUcVc1JIrA==",
@@ -680,14 +703,14 @@
         "vite": "^6.3.0 || ^7.0.0"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/arg": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/arg": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/arg/-/arg-5.0.2.tgz",
       "integrity": "sha512-PYjyFOLKQ9y57JvQ6QLo8dAgNqswh8M1RMJYdQduT6xbWSgK36P/Z/v+p888pM69jMMfS8Xd8F6I1kQ/I9HUGg==",
       "dev": true,
       "license": "MIT"
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/chokidar": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/chokidar": {
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.6.0.tgz",
       "integrity": "sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==",
@@ -712,7 +735,7 @@
         "fsevents": "~2.3.2"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/fast-glob": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/fast-glob": {
       "version": "3.3.3",
       "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.3.tgz",
       "integrity": "sha512-7MptL8U0cqcFdzIzwOTHoilX9x5BrNqye7Z/LuC7kCMRio1EMSyqRK3BEAUD7sXRq4iT4AzTVuZdhgQ2TCvYLg==",
@@ -729,7 +752,7 @@
         "node": ">=8.6.0"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/lilconfig": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/lilconfig": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/lilconfig/-/lilconfig-3.1.3.tgz",
       "integrity": "sha512-/vlFKAoH5Cgt3Ie+JLhRbwOsCQePABiU3tJ1egGvyQ+33R/vcwM2Zl2QR/LzjsBeItPt3oSVXapn+m4nQDvpzw==",
@@ -742,10 +765,10 @@
         "url": "https://github.com/sponsors/antonk52"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/postcss-load-config": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/postcss-load-config/-/postcss-load-config-4.0.2.tgz",
-      "integrity": "sha512-bSVhyJGL00wMVoPUzAVAnbEoWyqRxkjv64tUl427SKnPrENtq6hJwUojroMz2VB+Q1edmi4IfrAPpami5VVgMQ==",
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/postcss-load-config": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/postcss-load-config/-/postcss-load-config-6.0.1.tgz",
+      "integrity": "sha512-oPtTM4oerL+UXmx+93ytZVN82RrlY/wPUV8IeDxFrzIjXOLF1pN+EmKPLbubvKHT2HC20xXsCAH2Z+CKV6Oz/g==",
       "dev": true,
       "funding": [
         {
@@ -759,26 +782,33 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "lilconfig": "^3.0.0",
-        "yaml": "^2.3.4"
+        "lilconfig": "^3.1.1"
       },
       "engines": {
-        "node": ">= 14"
+        "node": ">= 18"
       },
       "peerDependencies": {
+        "jiti": ">=1.21.0",
         "postcss": ">=8.0.9",
-        "ts-node": ">=9.0.0"
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
       },
       "peerDependenciesMeta": {
+        "jiti": {
+          "optional": true
+        },
         "postcss": {
           "optional": true
         },
-        "ts-node": {
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
           "optional": true
         }
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/readdirp": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/readdirp": {
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
       "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
@@ -791,7 +821,7 @@
         "node": ">=8.10.0"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/readdirp/node_modules/picomatch": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/readdirp/node_modules/picomatch": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
       "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
@@ -804,10 +834,10 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/tailwindcss": {
-      "version": "3.4.17",
-      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.17.tgz",
-      "integrity": "sha512-w33E2aCvSDP0tW9RZuNXadXlkHXqFzSkQew/aIa2i/Sj8fThxwovwlXHSPXTbAHwEIhBFXAedUhP2tueAKP8Og==",
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/tailwindcss": {
+      "version": "3.4.18",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.18.tgz",
+      "integrity": "sha512-6A2rnmW5xZMdw11LYjhcI5846rt9pbLSabY5XPxo+XWdxwZaFEn47Go4NzFiHu9sNNmr/kXivP1vStfvMaK1GQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -819,7 +849,7 @@
         "fast-glob": "^3.3.2",
         "glob-parent": "^6.0.2",
         "is-glob": "^4.0.3",
-        "jiti": "^1.21.6",
+        "jiti": "^1.21.7",
         "lilconfig": "^3.1.3",
         "micromatch": "^4.0.8",
         "normalize-path": "^3.0.0",
@@ -828,7 +858,7 @@
         "postcss": "^8.4.47",
         "postcss-import": "^15.1.0",
         "postcss-js": "^4.0.1",
-        "postcss-load-config": "^4.0.2",
+        "postcss-load-config": "^4.0.2 || ^5.0 || ^6.0",
         "postcss-nested": "^6.2.0",
         "postcss-selector-parser": "^6.1.2",
         "resolve": "^1.22.8",
@@ -842,7 +872,7 @@
         "node": ">=14.0.0"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/tailwindcss/node_modules/glob-parent": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/tailwindcss/node_modules/glob-parent": {
       "version": "6.0.2",
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-6.0.2.tgz",
       "integrity": "sha512-XxwI8EOhVQgWp6iDL+3b0r86f4d6AX6zSU55HfB4ydCEuXLXc5FcYeOu+nnGftS4TEju/11rt4KJPTMgbfmv4A==",
@@ -855,10 +885,10 @@
         "node": ">=10.13.0"
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/vite": {
-      "version": "7.1.5",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-7.1.5.tgz",
-      "integrity": "sha512-4cKBO9wR75r0BeIWWWId9XK9Lj6La5X846Zw9dFfzMRw38IlTk2iCcUt6hsyiDRcPidc55ZParFYDXi0nXOeLQ==",
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/vite": {
+      "version": "7.1.12",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-7.1.12.tgz",
+      "integrity": "sha512-ZWyE8YXEXqJrrSLvYgrRP7p62OziLW7xI5HYGWFzOvupfAlrLvURSzv/FyGyy0eidogEM3ujU+kUG1zuHgb6Ug==",
       "dev": true,
       "license": "MIT",
       "peer": true,
@@ -931,12 +961,14 @@
         }
       }
     },
-    "components/language-chooser/svelte/language-chooser-svelte/node_modules/yaml": {
+    "components/language-chooser/svelte/language-chooser-svelte-daisyui/node_modules/yaml": {
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.1.tgz",
       "integrity": "sha512-lcYcMxX2PO9XMGvAJkJ3OsNMw+/7FKes7/hgerGUYWIoWu5j/+YQqcZr5JnPZWzOsEBgMbSbiSTn/dv/69Mkpw==",
       "dev": true,
       "license": "ISC",
+      "optional": true,
+      "peer": true,
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