Update EN languages fixes

geotrek/trekking/templates/trekking/trek_public_pdf.html

@@ -55,7 +55,7 @@ <h2>{{ object.districts.0.name }}{% if object.districts and object.city_departu
         {% endif %}
       </div>
       <div class="meta-items">
-        <div class="meta-items-title">{% trans "Usefull informations" %}</div>
+        <div class="meta-items-title">{% trans "Useful information" %}</div>
         <section class="meta-items-list">
           {% if object.practice %}
             <span class="meta-item">
@@ -163,15 +163,15 @@ <h2>{% trans "On your path..." %}</h2>
         </section>
       {% endblock poisSummary %}
       <div class="inner-title">
-        <h2>{% trans "All usefull informations" %}</h2>
+        <h2>{% trans "All useful information" %}</h2>
       </div>
       {% if object.is_park_centered %}
         <div class="advice">
           <div class="advice-title">
             <div class="advice-icon">
               <img src="{% static 'trekking/advice.svg' %}">
             </div>
-            {% trans "This hike is at the heart of the national park" %}
+            {% trans "This hike is in the core of the national park" %}
           </div>
           <div class="advice-content">{% trans "The national park is an unrestricted natural area but subjected to regulations which must be known by all visitors." %}</div>
         </div>