[Push #3]: Path Filter conflicts with i18n Internationalization

On an clean multi-language installation, the language prefixes returned by Path Filter are not as expected. (See examples below.)

Drupal-6.8 installation, with the following modules activated:

• Path (Core)
• Locale (Core)
• Content translation (Core)
• Internationalization (Multilanguage)

And the following settings:

• File system | Download method: Public.
• Language negotiation: Path prefix with language fallback.
• Multilingual system | Content selection mode: Mixed current language (if available) or default language (if not) and language neutral.
• Default language: English (path prefix 'en')
• Other language: Spanish (path prefix 'es')

If the administrator is using the English language, then Path Filter returns all paths prefixed with 'en', regardless of the page's language:

• "internal:otherpage" in 'en/page' links to 'en/otherpage'.
• "internal:otherpage" in 'es/page' links to 'en/otherpage' instead of 'es/otherpage'.

If the administrator switches to the Spanish language, and clears the cache, the reverse situation occurs: all paths get prefixed with 'es', now.

Using no prefix at all for the default language makes no real difference. the returned URLs still depend on the language the administrator is using, instead of the page's language.

Using 'Content selection mode: Current language and language neutral.' doesn't help either.