[SOLVED] error log

Hello.
My file error log is filled with messages like this quickly (see file) .
which is the problem and how to solve?
Thanks

You're defining duplicate language strings. Either you've duplicates in CB it self or you've something else installed trying to define those strings. Defines are constants, which means they can not change and trying to define the same constant will throw that warning.

These chains are not repeated anywhere else! (I think). Are only in English language cb plugin, but I can not turn it off.
In joomla configuration I have active for English and Spanish language site.
Can solution it be to disable languaje English for the site?

CB can't load two language plugins at once. So I don't see how having extra language plugins could cause an issue. There are also a 100+ defines in CBs language files yet only a few are erroring. So chances are high there are duplicate defines in either your language plugin it self or outside of the language plugin. Enable debug mode and maximum error reporting in Joomla global configuration then view a page with the issue and see if it'll tell you what is trying to define it as error in your log is only showing where it's already defined and not what is trying to redefine it.

Hello:
I believe that I have solved it:
the front end had also this one another problem: the translation of CB was working only on the pages CB, for items menu of other components the translation was not working when it was using acesef url's.
Well, after much to investigate and not to find solution acesef setting I have thought the following thing:
replaced file of lenguage default with file of Spanish lenguage and Spanish language eliminated file.
Result: all the messages of CB on all the pages Spanish and you do not notice in erro_log!!!
What do you think?

You shouldn't have to replace anything. If multiple language plugins were loaded then it'd be complaining about 100 or more language strings and not just those few. Regardless as long as you're ok with your solution I guess there's no need to investigate further.