is this for master instance or standby instance?There could be multiple reason for this, Can you login to felix console and check the bundle status?

Experience fragment carries its own style (element, css, js) as they are channel agnostic and use their own structure.I am wondering, you may want to use content fragment instead.

I am bit unclear on which specific icon you are trying to replace. Is it this one? If not, can you add a screenshot?

You may to check dispatcher logs for more details. Also check if you have existing rewrite rule which may be affecting this request

You can control the inclusion of a script if its not required for any functionality on page.Which scripts you are seeing getting included on page and you dont need it?

Most of things in like metatags, title, image optimization are similar to what you see for any websiteYou can create tags in aem. For any page, author those in default or custom tag field you get in page properties and render it via you HTL in meta tagHowever there are certain seo practices you can ...

I would say search for multilingual resource in adobe docs, you will get a lot of useful content. I am listing couple of them herehttps://helpx.adobe.com/experience-manager/how-to/multilingual-overview.html https://helpx.adobe.com/experience-manager/6-3/sites/administering/using/translation.html htt...

Except OOTB simple content fragment, you need to enable content fragment model if that's wht you are referring to as additional functionality. You can do it by following below steps herehttps://helpx.adobe.com/in/experience-manager/6-4/assets/using/content-fragments-models.html

That's the existing issue with code for 6.1 on community. I have seen it and fixed while refactoring it for 6.4 here https://helpx.adobe.com/experience-manager/using/twofactor64.html Would recommend to take auth handler code from here and keep everything but annotations

You can use vlt or crx2oak. Both should work. You would have to run manually those commands but if you are thinking of automation, you can consider a shell script running as cron job and using those command internally.http://jackrabbit.apache.org/filevault/rcp.html https://helpx.adobe.com/experience...