Customize a website oxyclassifieds style in spanish - repost

I have a oxyclassifieds website style, im not that good with the internet stuff and i would like to customize , i need the translate all the email that the user will get after has used the website to Spanish , and some other info that is still in English, i want to change some icons in the site, i have try to customize the site but i have done something wrong and is not working how it should be, i sure is someting realiy easy but i got lost