diff --git a/workspaces/linguist/.changeset/chilly-readers-own.md b/workspaces/linguist/.changeset/chilly-readers-own.md
new file mode 100644
index 0000000000..e137ce11a2
--- /dev/null
+++ b/workspaces/linguist/.changeset/chilly-readers-own.md
@@ -0,0 +1,5 @@
+---
+'@backstage-community/plugin-linguist-backend': patch
+---
+
+Marked `createRouter`, `createRouterFromConfig`, `RouterOptions`, and `PluginOptions` as deprecated, to be removed soon after the Backstage `1.32.0` release in October
diff --git a/workspaces/linguist/plugins/linguist-backend/api-report.md b/workspaces/linguist/plugins/linguist-backend/api-report.md
index e5161dc2ef..42e7da77e8 100644
--- a/workspaces/linguist/plugins/linguist-backend/api-report.md
+++ b/workspaces/linguist/plugins/linguist-backend/api-report.md
@@ -17,13 +17,13 @@ import { SchedulerService } from '@backstage/backend-plugin-api';
 import { SchedulerServiceTaskScheduleDefinition } from '@backstage/backend-plugin-api';
 import { UrlReaderService } from '@backstage/backend-plugin-api';
 
-// @public (undocumented)
+// @public @deprecated (undocumented)
 export function createRouter(
   pluginOptions: PluginOptions,
   routerOptions: RouterOptions,
 ): Promise<express.Router>;
 
-// @public (undocumented)
+// @public @deprecated (undocumented)
 export function createRouterFromConfig(
   routerOptions: RouterOptions,
 ): Promise<express.Router>;
@@ -40,7 +40,7 @@ export interface LinguistBackendApi {
 const linguistPlugin: BackendFeatureCompat;
 export default linguistPlugin;
 
-// @public (undocumented)
+// @public @deprecated (undocumented)
 export interface PluginOptions {
   // (undocumented)
   age?: HumanDuration;
@@ -56,7 +56,7 @@ export interface PluginOptions {
   useSourceLocation?: boolean;
 }
 
-// @public (undocumented)
+// @public @deprecated (undocumented)
 export interface RouterOptions {
   // (undocumented)
   auth?: AuthService;
diff --git a/workspaces/linguist/plugins/linguist-backend/src/service/router.ts b/workspaces/linguist/plugins/linguist-backend/src/service/router.ts
index 8a2ecde328..19b85c8e2e 100644
--- a/workspaces/linguist/plugins/linguist-backend/src/service/router.ts
+++ b/workspaces/linguist/plugins/linguist-backend/src/service/router.ts
@@ -38,7 +38,10 @@ import {
 } from '@backstage/backend-plugin-api';
 import { MiddlewareFactory } from '@backstage/backend-defaults/rootHttpRouter';
 
-/** @public */
+/**
+ * @deprecated Please migrate to the new backend system as this will be removed in the future.
+ * @public
+ * */
 export interface PluginOptions {
   schedule?: SchedulerServiceTaskScheduleDefinition;
   age?: HumanDuration;
@@ -48,7 +51,10 @@ export interface PluginOptions {
   kind?: string[];
 }
 
-/** @public */
+/**
+ * @deprecated Please migrate to the new backend system as this will be removed in the future.
+ * @public
+ * */
 export interface RouterOptions {
   linguistBackendApi?: LinguistBackendApi;
   logger: LoggerService;
@@ -61,7 +67,10 @@ export interface RouterOptions {
   httpAuth?: HttpAuthService;
 }
 
-/** @public */
+/**
+ * @deprecated Please migrate to the new backend system as this will be removed in the future.
+ * @public
+ * */
 export async function createRouter(
   pluginOptions: PluginOptions,
   routerOptions: RouterOptions,
@@ -149,7 +158,10 @@ export async function createRouter(
   return router;
 }
 
-/** @public */
+/**
+ * @deprecated Please migrate to the new backend system as this will be removed in the future.
+ * @public
+ * */
 export async function createRouterFromConfig(routerOptions: RouterOptions) {
   const { config } = routerOptions;
   const pluginOptions: PluginOptions = {};