diff --git a/docs/src/api/params.md b/docs/src/api/params.md
index b72de5f255..e059fffe46 100644
--- a/docs/src/api/params.md
+++ b/docs/src/api/params.md
@@ -605,13 +605,6 @@ for a list of supported timezone IDs. Defaults to the system timezone.
   - `accuracy` ?<[float]> Non-negative accuracy value. Defaults to `0`.
 
 ## context-option-locale
-* langs: js
-- `locale` <[string]>
-
-Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value, `Accept-Language` request header value as well as number and date formatting rules. Defaults to `en-US`. Learn more about emulation in our [emulation guide](../emulation.md#locale--timezone).
-
-## context-option-locale-java-csharp-python
-* langs: java, csharp, python
 - `locale` <[string]>
 
 Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value, `Accept-Language` request header value as well as number and date formatting rules. Defaults to the system default locale. Learn more about emulation in our [emulation guide](../emulation.md#locale--timezone).
diff --git a/packages/playwright-core/types/types.d.ts b/packages/playwright-core/types/types.d.ts
index 5252979fb2..7086d87f2e 100644
--- a/packages/playwright-core/types/types.d.ts
+++ b/packages/playwright-core/types/types.d.ts
@@ -9856,8 +9856,8 @@ export interface Browser {
 
     /**
      * Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value,
-     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to `en-US`. Learn more
-     * about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
+     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to the system default
+     * locale. Learn more about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
      */
     locale?: string;
 
@@ -14944,8 +14944,8 @@ export interface BrowserType<Unused = {}> {
 
     /**
      * Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value,
-     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to `en-US`. Learn more
-     * about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
+     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to the system default
+     * locale. Learn more about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
      */
     locale?: string;
 
@@ -16695,8 +16695,8 @@ export interface AndroidDevice {
 
     /**
      * Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value,
-     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to `en-US`. Learn more
-     * about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
+     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to the system default
+     * locale. Learn more about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
      */
     locale?: string;
 
@@ -19156,8 +19156,8 @@ export interface Electron {
 
     /**
      * Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value,
-     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to `en-US`. Learn more
-     * about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
+     * `Accept-Language` request header value as well as number and date formatting rules. Defaults to the system default
+     * locale. Learn more about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
      */
     locale?: string;
 
@@ -22001,8 +22001,8 @@ export interface BrowserContextOptions {
 
   /**
    * Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value,
-   * `Accept-Language` request header value as well as number and date formatting rules. Defaults to `en-US`. Learn more
-   * about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
+   * `Accept-Language` request header value as well as number and date formatting rules. Defaults to the system default
+   * locale. Learn more about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
    */
   locale?: string;
 
diff --git a/packages/playwright/types/test.d.ts b/packages/playwright/types/test.d.ts
index fed6a1bdeb..8d05bdafef 100644
--- a/packages/playwright/types/test.d.ts
+++ b/packages/playwright/types/test.d.ts
@@ -6247,8 +6247,8 @@ export interface PlaywrightTestOptions {
   javaScriptEnabled: boolean;
   /**
    * Specify user locale, for example `en-GB`, `de-DE`, etc. Locale will affect `navigator.language` value,
-   * `Accept-Language` request header value as well as number and date formatting rules. Defaults to `en-US`. Learn more
-   * about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
+   * `Accept-Language` request header value as well as number and date formatting rules. Defaults to the system default
+   * locale. Learn more about emulation in our [emulation guide](https://playwright.dev/docs/emulation#locale--timezone).
    *
    * **Usage**
    *