diff --git a/src/services/api.ts b/src/services/api.ts
index ba36294..4809013 100644
--- a/src/services/api.ts
+++ b/src/services/api.ts
@@ -322,14 +322,15 @@ export class API implements IAPI {
     return this.#api.post('/HolidayMode/Update', postData)
   }
 
-  public async setLanguage(language: string): Promise<boolean> {
-    const { data: didLanguageChange } = await this.#setLanguage({
-      postData: { language: this.#getLanguageCode(language) },
-    })
-    if (didLanguageChange) {
-      this.language = language
+  public async setLanguage(language: string): Promise<void> {
+    if (language !== this.language) {
+      const { data: hasLanguageChanged } = await this.updateLanguage({
+        postData: { language: this.#getLanguageCode(language) },
+      })
+      if (hasLanguageChanged) {
+        this.language = language
+      }
     }
-    return didLanguageChange
   }
 
   public async setPower({
@@ -340,6 +341,14 @@ export class API implements IAPI {
     return this.#api.post('/Device/Power', postData)
   }
 
+  public async updateLanguage({
+    postData,
+  }: {
+    postData: { language: Language }
+  }): Promise<{ data: boolean }> {
+    return this.#api.post<boolean>('/User/UpdateLanguage', postData)
+  }
+
   async #authenticate({
     password,
     username,
@@ -450,14 +459,6 @@ export class API implements IAPI {
     }
   }
 
-  async #setLanguage({
-    postData,
-  }: {
-    postData: { language: Language }
-  }): Promise<{ data: boolean }> {
-    return this.#api.post<boolean>('/User/UpdateLanguage', postData)
-  }
-
   #setOptionalProperties({
     language,
     password,
diff --git a/src/services/interfaces.ts b/src/services/interfaces.ts
index 9dafa4d..94705e8 100644
--- a/src/services/interfaces.ts
+++ b/src/services/interfaces.ts
@@ -1,4 +1,4 @@
-import type { DeviceType } from '../enums.js'
+import type { DeviceType, Language } from '../enums.js'
 import type {
   Building,
   EnergyData,
@@ -143,11 +143,15 @@ export interface IAPI {
   }: {
     postData: HolidayModePostData
   }) => Promise<{ data: FailureData | SuccessData }>
-  setLanguage: (language: string) => Promise<boolean>
   setPower: ({
     postData,
   }: {
     postData: SetPowerPostData
   }) => Promise<{ data: boolean }>
+  updateLanguage: ({
+    postData,
+  }: {
+    postData: { language: Language }
+  }) => Promise<{ data: boolean }>
   onSync?: () => Promise<void>
 }