Hi Toufiq.
In this link: http://pangeast2dio.com/index.php/ || the page should appear correctly, without the need for the -EN- suffix to appear, for example, in the following pages the annoying -EN- suffix does not appear.
http://ecoworldtravelagency.pe/index.php
http://gpsglobal.com.pe/
http://estructurasmetalicasvera.com/index.php
and I could list many more pages that do not show that error
You should fix this problem with the language that hinders SEO
This link should not be correct: : http://pangeast2dio.com/index.php/en/
and it is practically impossible to configure in Spanish Language, because the articles and modules disappear.
I would ask you to configure the articles and elements of the menu in Spanish, without the need to make a multilanguage page and that these elements do not disappear.
Victor