Updated km localization for v11

[huypanha]

Description

This update simply adds missing translations for v11.

Related Issues

• Related Added khmer localization #2358

Type of Change

• ✨ New feature: Adds new functionality without breaking existing features.
• 🛠️ Bug fix: Resolves an issue without altering current behavior.
• 🧹 Code refactor: Code restructuring that does not affect behavior.
• ❌ Breaking change: Alters existing functionality and requires updates.
• 🧪 Tests: Adds new tests or modifies existing tests.
• 📝 Documentation: Updates or additions to documentation.
• 🗑️ Chore: Routine tasks, or maintenance.
• ✅ Build configuration change: Changes to build or deploy processes.

[EchoEllet]

Is it insertVideo? If yes, then this PR should target release/v11 since it's not available within the master.

[EchoEllet]

It has been translated in a commit to release/v11.

Closing the PR since this is the only key that's not translated, though let me know if you made other changes to the translations.

Thanks for your contribution.