Why a Website Shows the Wrong Language

A website does not necessarily select its language from the proxy region alone. It may also consider the browser locale, request language order, saved account settings, existing cookies, a regional URL, and its own selection rules.

In MaskPilot, Web language and Requested language list form the profile’s language identity. The first is the browser’s preferred locale, while the second gives websites an ordered set of language preferences. If they conflict, different pages may select different languages.

Separate the client UI from webpage language

The language used by the MaskPilot client is not the language exposed by a browser profile. Changing the client UI language does not automatically change the profile’s language identity.

To adjust webpage language, edit the target profile and open its fingerprint settings:

1. Select the required regional language under Web language, such as Simplified Chinese, English (US), or English (UK).
2. Check Requested language list. Selecting a web-language preset makes MaskPilot fill in a matching priority order.
3. Save the profile, fully close its running browser, and launch it again.

Fingerprint settings are written when the browser starts. Refreshing a page, or saving while that browser is still running, is not enough to verify a new language identity. See why profile settings did not apply.

How to format the request language list

Use comma-separated language tags, for example:

en-US,en

The list must follow these rules:

• Its first item must match Web language.
• It can contain at most 10 items.
• Do not repeat a language tag.
• Do not add q= weights; MaskPilot uses the list order as the priority.

When uncertain, use a preset from Web language instead of assembling a long list manually.

Why the website still does not change

A language request is a signal that a website may consider. It does not override the site’s own saved choice. Continue in this order:

1. Check whether the website account stores its own language or region.
2. Check the URL for a language path, regional subdomain, or region parameter.
3. When it will not affect business data, test in a new session for that site to rule out old cookies or site storage.
4. Confirm that the real proxy exit region, profile time zone, and webpage language match the intended workflow.
5. Retest with the same MaskPilot profile instead of substituting the system browser or another profile.

If the proxy exit rotates, a website may also select another default from the IP region. Confirm the exit used for this launch before treating the result as a language-setting problem. See why a proxy changes the browser time zone and why the proxy check failed.

Does a proxy automatically change webpage language?

No. For a proxied profile, MaskPilot determines the time zone from the current exit before launch, but it does not rewrite Web language or Requested language list from the proxy region. This keeps the profile’s language identity from changing whenever an exit rotates.

When a workflow requires regional consistency, check the proxy exit, time zone, webpage language, and request language list separately rather than assuming that one setting synchronizes all the others. See configure a stable browser fingerprint for the complete setup.

Before contacting support

Record only the website domain and any necessary page path, along with the displayed and expected languages, the profile’s Web language and Requested language list, the website account language, the real proxy exit, and the retest time after a full relaunch. Before sharing, remove query parameters, fragments, one-time sign-in codes, and all tokens from the URL, and redact account identifiers and proxy credentials from screenshots.

MDN documents Accept-Language as the client’s preferred natural language. W3C guidance on language and locale also explains why this signal alone should not be used to infer a user’s region or complete locale preference.