hey tony,

to change the word "by" into "written by" it's best to use joomla language overrides, otherwise you would need to modify the language file again after every update. you can find more about language overrides here: http://stackideas.com/blog/how-to-override-joomla-language-strings

for the links below the bio area you can take a look at the file at components/com_easyblog/themes/default/author.info.php

hope that helps and have a nice day

In case I am wrong that Changing itemprop="author" has anything to do with it, do I have to do all that to change "by" to "written by"?

hey tony,
the itemprop="author" has nothing do with the "by" text and also nothing with the customizations you want to do at the links. this is used for schema.org metadata so you can completely ignore it

to change the word "by" you can do this in your language file. for english it's in the file language/en-GB/en-GB.com_easyblog.ini - search for: COM_EASYBLOG_BY="by" - and change it to your liking. I just recommend the language overrides because if you change it in the file directly it will be overridden with the next easyblog update and you would have to do it again.

hope that helps