Configures pseudo-localization for the app (replaces translatable strings with accented variants like "Submit" → "Şüƀɱîţ" + 35% length expansion) - surfaces UI issues without needing actual translators: hardcoded strings, truncation, encoding, and bidi handling. Use when preparing an app for translation (i18n / internationalization), validating l10n infrastructure, or when the user mentions pseudo-localization or localization testing.