diff --git a/web/src/objects/field-input.test.tsx b/web/src/objects/field-input.test.tsx
index afb5c78..458e85a 100644
--- a/web/src/objects/field-input.test.tsx
+++ b/web/src/objects/field-input.test.tsx
@@ -1,10 +1,13 @@
 import { expect, test } from "vitest";
-import { screen } from "@testing-library/react";
+import { screen, within } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
 import { useForm } from "react-hook-form";
 import { renderApp } from "../test/render";
 import { FieldInput } from "./field-input";
 import { fieldDefinitions } from "../test/fixtures";
 
+type FormValues = { fields: Record<string, unknown> };
+
 function Harness({ defKey }: { defKey: string }) {
   const def = fieldDefinitions.find((d) => d.key === defKey)!;
   const form = useForm({ defaultValues: { fields: {} as Record<string, unknown> } });
@@ -12,6 +15,24 @@ function Harness({ defKey }: { defKey: string }) {
   return <FieldInput definition={def} form={form} />;
 }
 
+function FormHarness({
+  defKey,
+  onSubmit,
+}: {
+  defKey: string;
+  onSubmit: (values: FormValues) => void;
+}) {
+  const def = fieldDefinitions.find((d) => d.key === defKey)!;
+  const form = useForm<FormValues>({ defaultValues: { fields: {} as Record<string, unknown> } });
+
+  return (
+    <form onSubmit={form.handleSubmit(onSubmit)}>
+      <FieldInput definition={def} form={form} />
+      <button type="submit">Submit</button>
+    </form>
+  );
+}
+
 test("text field renders a text input labelled in the active locale", async () => {
   renderApp(<Harness defKey="inscription" />);
   expect(await screen.findByLabelText("Inscription")).toBeInTheDocument();
@@ -27,12 +48,40 @@ test("localized_text renders a single input for the default language", async ()
   expect(await screen.findByLabelText(/^title/i)).toBeInTheDocument();
 });
 
-test("term field renders a select populated from the vocabulary", async () => {
-  renderApp(<Harness defKey="material" />);
-  expect(await screen.findByText("Bronze")).toBeInTheDocument();
+test("term field filters and selects from the vocabulary combobox", async () => {
+  const user = userEvent.setup();
+  const submitted: FormValues[] = [];
+
+  renderApp(<FormHarness defKey="material" onSubmit={(v) => submitted.push(v)} />);
+
+  const input = await screen.findByPlaceholderText("— select —");
+
+  await user.click(input);
+  await user.type(input, "bro");
+
+  const body = within(document.body);
+
+  await user.click(await body.findByText("Bronze"));
+  await user.click(screen.getByRole("button", { name: "Submit" }));
+
+  expect(submitted[0]?.fields.material).toBe("t-bronze");
 });
 
-test("authority field renders a select populated by kind", async () => {
-  renderApp(<Harness defKey="maker" />);
-  expect(await screen.findByText("Ada Lovelace")).toBeInTheDocument();
+test("authority field filters and selects from the authority combobox", async () => {
+  const user = userEvent.setup();
+  const submitted: FormValues[] = [];
+
+  renderApp(<FormHarness defKey="maker" onSubmit={(v) => submitted.push(v)} />);
+
+  const input = await screen.findByPlaceholderText("— select —");
+
+  await user.click(input);
+  await user.type(input, "ada");
+
+  const body = within(document.body);
+
+  await user.click(await body.findByText("Ada Lovelace"));
+  await user.click(screen.getByRole("button", { name: "Submit" }));
+
+  expect(submitted[0]?.fields.maker).toBe("a-ada");
 });
diff --git a/web/src/objects/field-input.tsx b/web/src/objects/field-input.tsx
index 5fc88e8..c3ab8b3 100644
--- a/web/src/objects/field-input.tsx
+++ b/web/src/objects/field-input.tsx
@@ -4,12 +4,13 @@ import { useTranslation } from "react-i18next";
 import type { components } from "../api/schema";
 import { useAuthorities, useTerms } from "../api/queries";
 import { useConfig } from "../config/config-context";
+import { labelText } from "../lib/labels";
+import { OptionsCombobox } from "./options-combobox";
 import { Checkbox } from "@/components/ui/checkbox";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 
 type FieldDefinitionView = components["schemas"]["FieldDefinitionView"];
-type LabelView = components["schemas"]["LabelView"];
 
 type FieldForm<TValues extends { fields: Record<string, unknown> }> = UseFormReturn<TValues>;
 
@@ -19,50 +20,6 @@ function fieldPath<TValues extends { fields: Record<string, unknown> }>(
   return `fields.${key}` as Path<TValues>;
 }
 
-function labelIn(labels: LabelView[], lang: string): string {
-  return (
-    labels.find((l) => l.lang === lang)?.label ??
-    labels.find((l) => l.lang === "en")?.label ??
-    labels[0]?.label ??
-    ""
-  );
-}
-
-// A native <select> keeps the bundle lean and is fully accessible; the shadcn Select
-// can replace it later without changing the value contract (option value = id).
-function OptionsSelect({
-  id,
-  value,
-  onChange,
-  options,
-  lang,
-  placeholder,
-}: {
-  id: string;
-  value: string;
-  onChange: (v: string) => void;
-  options: { id: string; labels: LabelView[] }[];
-  lang: string;
-  placeholder: string;
-}) {
-  return (
-    <select
-      id={id}
-      className="w-full rounded border px-2 py-1 text-sm"
-      value={value}
-      onChange={(e) => onChange(e.target.value)}
-    >
-      <option value="">{placeholder}</option>
-
-      {options.map((o) => (
-        <option key={o.id} value={o.id}>
-          {labelIn(o.labels, lang)}
-        </option>
-      ))}
-    </select>
-  );
-}
-
 export function FieldInput<TValues extends { fields: Record<string, unknown> }>({
   definition,
   form,
@@ -73,7 +30,7 @@ export function FieldInput<TValues extends { fields: Record<string, unknown> }>(
   const { t, i18n } = useTranslation();
   const { default_language } = useConfig();
   const lang = i18n.language.startsWith("sv") ? "sv" : "en";
-  const label = labelIn(definition.labels, lang);
+  const label = labelText(definition.labels, lang);
   const name = fieldPath<TValues>(definition.key);
   const placeholder = t("form.selectPlaceholder");
 
@@ -201,7 +158,7 @@ function TermField<TValues extends { fields: Record<string, unknown> }>({
         name={fieldPath<TValues>(definition.key)}
         rules={{ required: definition.required }}
         render={({ field }) => (
-          <OptionsSelect
+          <OptionsCombobox
             id={definition.key}
             value={(field.value as string) ?? ""}
             onChange={field.onChange}
@@ -239,7 +196,7 @@ function AuthorityField<TValues extends { fields: Record<string, unknown> }>({
         name={fieldPath<TValues>(definition.key)}
         rules={{ required: definition.required }}
         render={({ field }) => (
-          <OptionsSelect
+          <OptionsCombobox
             id={definition.key}
             value={(field.value as string) ?? ""}
             onChange={field.onChange}
diff --git a/web/src/objects/options-combobox.tsx b/web/src/objects/options-combobox.tsx
index 09ec994..38a14c2 100644
--- a/web/src/objects/options-combobox.tsx
+++ b/web/src/objects/options-combobox.tsx
@@ -1,4 +1,5 @@
 import type { components } from "../api/schema";
+import { labelText } from "../lib/labels";
 import {
   ComboboxRoot,
   ComboboxInputGroup,
@@ -16,15 +17,6 @@ type LabelView = components["schemas"]["LabelView"];
 
 export type Option = { id: string; labels: LabelView[] };
 
-export function labelIn(labels: LabelView[], lang: string): string {
-  return (
-    labels.find((l) => l.lang === lang)?.label ??
-    labels.find((l) => l.lang === "en")?.label ??
-    labels[0]?.label ??
-    ""
-  );
-}
-
 export function OptionsCombobox({
   id,
   value,
@@ -47,7 +39,7 @@ export function OptionsCombobox({
       items={options}
       value={selected}
       onValueChange={(option) => onChange(option?.id ?? "")}
-      itemToStringLabel={(option) => (option ? labelIn(option.labels, lang) : "")}
+      itemToStringLabel={(option) => (option ? labelText(option.labels, lang) : "")}
       isItemEqualToValue={(a, b) => a?.id === b?.id}
     >
       <ComboboxInputGroup>
@@ -62,7 +54,7 @@ export function OptionsCombobox({
           {(option: Option) => (
             <ComboboxItem key={option.id} value={option}>
               <ComboboxItemIndicator className="text-indigo-600">✓</ComboboxItemIndicator>
-              {labelIn(option.labels, lang)}
+              {labelText(option.labels, lang)}
             </ComboboxItem>
           )}
         </ComboboxList>