Fix links

Author: welcoMattic

translation.rst

@@ -715,14 +715,14 @@ configure the ``providers`` option:
 
 .. tip::
 
-    If you use Lokalise as provider and a locale format following the ISO 639-1 (e.g., "en" or "fr"),
-    you have to set the Custom Language Name setting in Lokalise for each of your locales,
-    in order to override the default value (which follow the ISO 639-1 succeeded by a sub-code
-    in capital letters that specifies the national variety (e.g., "GB" or "US" according to ISO 3166-1 alpha-2)).
+    If you use Lokalise as provider and a locale format following the `ISO 639-1`_ (e.g., "en" or "fr"),
+    you have to set the `Custom Language Name setting`_ in Lokalise for each of your locales,
+    in order to override the default value (which follow the `ISO 639-1`_ succeeded by a sub-code
+    in capital letters that specifies the national variety (e.g., "GB" or "US" according to `ISO 3166-1 alpha-2`_)).
 
 .. tip::
 
-    If you use PoEditor as provider, you have to define a Default Reference Language in your project,
+    If you use PoEditor as provider, you have to define a `Default Reference Language`_ in your project,
     otherwise your translations could not be correctly exported.
 
 Pushing and Pulling Translations