Localize legal links in authentication footer

Description

Localize the Terms of Service and Privacy Policy links in the authentication footer based on the user's selected language.

Expected behavior

When a supported language is selected, the legal links should point to the corresponding localized page on twenty.com.

For example:

• de-DE → /de/privacy-policy
• pt-BR → /pt/privacy-policy
• zh-CN → /zh/privacy-policy

For English, pseudo-locale, and unsupported languages, the links should continue using the default non-localized URLs.

Context

The authentication footer currently uses non-localized legal links regardless of the selected application language.