Hi George,

Hi, I need to customize the color of the 'Search' button, as well as the color of the 'Subscribe to our blog' button

1. Search Button
[gist type="css"]
body #eb .mod-btn-primary {
color: #fff !important;
background-color: #951ee5 !important;
border-color: #511ee5 !important;
}
[/gist]

2. Subscribe to our blog
[gist type="css"]
body #eb .btn-primary {
color: #fff !important;
background-color: #4ae2d9 !important;
border-color: #4dde34 !important;
}
[/gist]

You can follow the example above and change to your desired colour and add this in your site backend > Components > EasyBlog > Themes > Custom CSS

I would like also to modify some text in my native language

Here are the language constants
1. For the word Search for blogs ...
MOD_EASYBLOGSEARCH_PLACEHOLDER

2. For the word Subscribe to the blog
COM_EASYBLOG_SUBSCRIPTION_SITE_DIALOG_TITLE

3. For By subscribing to the blog, you will be notified whenever a new blog post is created on the site.
COM_EASYBLOG_SUBSCRIPTION_SITE_DIALOG_CONTENT

4. For the button Search
MOD_EASYBLOGSEARCH_SEARCH

5. For the button Subscribe to our blog
MOD_SUBSCRIBE_MESSAGE_SITE

For your information, you also can refer to this document, there is some guidance on creating language overrides https://stackideas.com/docs/easyblog/administrators/translations/create-language-overrides