chore: Clarify guides

apps/core/guides/features/i18n.md

@@ -8,7 +8,7 @@ allows non-developers on a team to make copy changes.
 2. When your application supports multiple languages, it is easy for translators
 to provide translations for all of your copy at once.
 
-In Legendary, we provide a set of tools for doing this.
+In Legendary, we provide a set of tools for doing this via [linguist](https://github.com/change/linguist).
 
 - (English) strings are stored in config/i18n/en.yml.
 - You can call `Legendary.I18n.t!/2` to get a string by its key. For example: `Legendary.I18n.t! "en", "site.title"` retrieves the english version of the
@@ -20,5 +20,20 @@ string labeled "title" under the section "site" on en.yml.
 Note that the first argument is a two-letter language code. In order to support
 other languages, you can provide more yml files in config/i18n (example, config/i18n/fr.yml for French) and call t!/2 with that language code instead.
 
+Linguist also supports templated translations. If you have a section in en.yml like this:
+
+```yaml
+app:
+  hello_message: Hello, %{name}!
+```
+
+then you could call `t!` substitutions like this:
+
+```elixir
+t! "en", "app.hello_message", name: "Legend"
+```
+
+to get the string "Hello, legend!"
+
 **On the roadmap:** in the future, we intend to provide a mechanism for detecting
 and managing each visitor's language and providing those strings if available.

apps/core/guides/overview.md

@@ -27,7 +27,7 @@ Since Legendary is both a template and a framework, you can simply clone the rep
 to start using it. It's a fully functional Phoenix app as-is. To start a new project:
 
 ```sh
-git clone git@gitlab.com:mythic-insight/legendary.git <project_name>
+git clone https://gitlab.com/mythic-insight/legendary.git <project_name>
 ```
 
 In order to start the server, run `script/server`. Any dependencies required