seppo renfors

The complete text was:
As for "grammar", it is the least important of other aspects of the
stone. There was no formalised grammar then and no dictionaries. There
were many dialects and mixtures of dialects as well. So he's barking
up the wrong tree there too!
[end restore]

I think the deleted portion of the text explains well enough what was
intended. That is to say a reasonable well travelled person would not
necessarily have had any specific dialect - nor therefor a specific
grammar related to a particular dialect.