100% a more fitting community for this post, I just didnt rememeber it at the time

Yes, they are errors

Examples of such things being labelled as an error:

https://learningintheopen.org/2024/12/12/microsoft-outlook-error-error-failed-to-load-localized-strings/

https://docs.revenera.com/installshield26helplib/rn/Content/helplibrary/Localized_String_Considerations.htm

I don’t think its completely unnecessary, it helps save some time

Only thing to add to what has already been said: Office related stuff will be your biggest issue. Personally I suffer a lot with the web version of the Office apps, so I recommend dual boot or VM for when using office.

I would only be swapping once and then having the windows SSD in the USB C hub. Would you still recommend that I install the SSD straight away in the laptop and set it up from there?