Thanks for your kind answer, Mdale. Anything that I can do to help, or indeed anyone else, please let us know.
There are more unclear variables in Add Media Wizard - Add Media message group:
What messages the variables stand in the following messages for?
- mwe-error-not-loggedin-file $1?
- mwe-upload-once-done $1? $2?
- mwe-ie-inline-upload $1? $2?
- mwe-not-logged-in-uploads $1? $2?, see also above in the first message of Hamilton Abreu
- mwe-warning-upload-to-commons $2?, see also above in the first message of Hamilton Abreu
And which message follows message mwe-i-would-like-to?