It appears that a recent visitor to the History stack, "basque-spaniards", is creating a new account for each visit. I've seen at least 4 accounts but there may be others...
From the style, language and content these all appear to be owned by the same author and, from the usage, I imagine that they aren't intentional sock-puppet accounts.
Can these be merged into a single account? What's the best way of contacting this user to inform them how to use a single account for all of their questions and answers?