diff --git a/scripts/app.py b/scripts/app.py
index 1b5320c..d2cf258 100644
--- a/scripts/app.py
+++ b/scripts/app.py
@@ -1,9 +1,23 @@
 #!/usr/bin/env/ python
 
-from flask import Flask, render_template, request, Response
+#    Copyright (C) 2021, Anais Berck
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details: <http://www.gnu.org/licenses/>.
+
+from flask import Flask, render_template, request, Response, session
 # from weasyprint import HTML
 from pagedjs import make_pdf
-from settings import DEBUG, BASEURL
+from settings import DEBUG, BASEURL, DEFAULT_LANGUAGE, SECRET_KEY
+
+import os
+from fcntl import lockf, LOCK_EX, LOCK_UN
 
 # Spacy tries to import CUDA, do not break when it fails
 try:
@@ -16,17 +30,89 @@ import os.path
 basepath = os.path.dirname(__file__)
 
 app = Flask(__name__)
+app.secret_key = SECRET_KEY
 
 # Book HTML is loaded through filesystem, in a tmp dir, make path absolute.
 PAGEDJS_STATIC_DIR = os.path.join(basepath, 'static')
 
+COUNTER_PATH_ES = 'edition_counter.txt'
+COUNTER_PATH_EN = 'edition_counter_en.txt'
+
+def get_edition_count_es():
+  fd = os.open(COUNTER_PATH_ES, os.O_RDWR|os.O_CREAT)
+  lockf(fd, LOCK_EX)
+  fo = os.fdopen(fd, 'r+', encoding='utf-8')
+  content = fo.read()
+  if not content:
+    edition_count = 0
+  else:
+    edition_count = int(content.strip())
+  edition_count += 1
+  fo.seek(0)
+  fo.truncate()
+  fo.write(str(edition_count))
+  fo.flush()
+  lockf(fd, LOCK_UN)
+  os.close(fd)
+
+  return edition_count
+
+def get_edition_count_en():
+  fd = os.open(COUNTER_PATH_EN, os.O_RDWR|os.O_CREAT)
+  lockf(fd, LOCK_EX)
+  fo = os.fdopen(fd, 'r+', encoding='utf-8')
+  content = fo.read()
+  if not content:
+    edition_count = 0
+  else:
+    edition_count = int(content.strip())
+  edition_count += 1
+  fo.seek(0)
+  fo.truncate()
+  fo.write(str(edition_count))
+  fo.flush()
+  lockf(fd, LOCK_UN)
+  os.close(fd)
+
+  return edition_count
+
+def get_language():
+  if 'LANGUAGE' in session:
+    return session['LANGUAGE']
+  else:
+    return DEFAULT_LANGUAGE
+
+def set_language(language):
+  session['LANGUAGE'] = language
+  session.modified = True
+
+def index_es():
+  return render_template('index.html')
+
+def index_en():
+  return render_template('index_en.html')
+
+@app.route('{}/en'.format(BASEURL))
+def en():
+  set_language('en')
+  return index()
+  
+@app.route('{}/es'.format(BASEURL))
+def es():
+  set_language('es')
+  return index()
+
 @app.route('{}/'.format(BASEURL))
 def index():
-  return render_template('index.html')
+  if get_language() == 'es':
+    return index_es()
+  else:
+    return index_en()
 
-@app.route('{}/book'.format(BASEURL), methods=['POST'])
-def book():
-  fragment = max(0, min(1, int(request.form['fragment'])))
+def book_es ():
+  edition_count = get_edition_count_es()
+
+  fragment = max(0, min(1, int(request.form['fragment'])))  
 
   first_word = 'un'
 
@@ -39,14 +125,15 @@ def book():
     author = 'Benito Pérez Gáldos' # Non breaking spaces
     title = 'Miau'
 
-  path = crear_camino(novel, first_word)
+  path = crear_camino(novel, first_word, 'es')
 
   context = { 
     'title': title, 
     'author': author, 
     'path': path, 
     'STATIC_DIR': '/static' if DEBUG else PAGEDJS_STATIC_DIR,
-    'DEBUG': DEBUG
+    'DEBUG': DEBUG,
+    'edition_count': edition_count,
   }
   
   html = render_template('book.html', **context)
@@ -59,7 +146,55 @@ def book():
     r = Response(pdf, mimetype='application/pdf')
 
     r.headers.extend({
-      'Content-Disposition': 'attachment; filename="Paseo por arboles de madrid.pdf"'
+      'Content-Disposition': 'attachment; filename="Paseo por arboles de Madrid.pdf"'
     })
 
     return r
+
+def book_en ():
+  edition_count = get_edition_count_en()
+  
+  fragment = max(0, min(1, int(request.form['fragment'])))  
+
+  first_word = 'a'
+
+  if fragment == 0:
+    novel = os.path.join(basepath, '../data/emilia_english.txt')
+    author = 'Emilia Pardo Bazán' # Non breaking spaces
+    title = 'The Swan of Vila Morta' # Non breaking spaces
+  else:
+    novel = os.path.join(basepath, '../data/benito_english.txt')
+    author = 'Benito Pérez Gáldos' # Non breaking spaces
+    title = 'Marianela'
+
+  path = crear_camino(novel, first_word, 'en')
+
+  context = { 
+    'title': title, 
+    'author': author, 
+    'path': path, 
+    'STATIC_DIR': '/static' if DEBUG else PAGEDJS_STATIC_DIR,
+    'DEBUG': DEBUG,
+    'edition_count': edition_count,
+  }
+  
+  html = render_template('book_en.html', **context)
+  
+  if (DEBUG):
+    return html
+  else:
+    pdf = make_pdf(html)
+
+    r = Response(pdf, mimetype='application/pdf')
+
+    r.headers.extend({
+      'Content-Disposition': 'attachment; filename="Walk along the trees of Madrid.pdf"'
+    })
+
+    return r
+@app.route('{}/book'.format(BASEURL), methods=['POST'])
+def book():
+  if get_language() == 'es':
+    return book_es()
+  else:
+    return book_en()
diff --git a/scripts/medialab.py b/scripts/medialab.py
index 3008523..0cf7940 100644
--- a/scripts/medialab.py
+++ b/scripts/medialab.py
@@ -16,6 +16,7 @@ import random
 
 # Cargar tokenizer en español
 nlp = spacy.load("es_core_news_sm")
+nlp_en = spacy.load("en_core_web_sm")
 
 #FUNCIONES_________________________________________________________________
 
@@ -26,7 +27,7 @@ def limpiar_texto(fragmento):
 	fragmento_limpio = ' '.join(fragmento_limpio)
 	return fragmento_limpio
 
-def crear_base_datos(nombre_texto):
+def crear_base_datos(nombre_texto, lenguaje='es'):
 	# Abrir el archivo de texto para crear la base de datos
 	archivo = open(nombre_texto, 'r')
 	fragmento = archivo.read()
@@ -34,8 +35,12 @@ def crear_base_datos(nombre_texto):
 	fragmento_limpio = limpiar_texto(fragmento)
 	
 	# Tokenización del fragmento de texto
-	doc = nlp(fragmento_limpio)
-	doc_len = len(doc)
+	if lenguaje == 'es':
+		doc = nlp(fragmento_limpio)
+		doc_len = len(doc)
+	else:
+		doc = nlp_en(fragmento_limpio)
+		doc_len = len(doc)
 
 	palabras_arboles = {} #Verbos, sustantivos, adverbios y adjetivos
 	palabras_camino = {} #El resto de palabras
diff --git a/scripts/paseo.py b/scripts/paseo.py
index e247c76..c164bb9 100644
--- a/scripts/paseo.py
+++ b/scripts/paseo.py
@@ -77,12 +77,12 @@ def path(word, words_tree, words_path, trees):
 	return itinerary
 
 # Genera un camino a partir de un texto y una palabra del texto
-def crear_camino(nombre_archivo, palabra_inicial):
+def crear_camino(nombre_archivo, palabra_inicial, lenguaje='es'):
 	trees = load_trees_from_json()
 	shuffle(trees)
 	
 	#print("Starting to read text")
-	(palabras_arboles, palabras_camino) = crear_base_datos(nombre_archivo)
+	(palabras_arboles, palabras_camino) = crear_base_datos(nombre_archivo, lenguaje)
 	
 	#print("Amount of tree words: ", len(palabras_arboles))
 
diff --git a/scripts/templates/book.html b/scripts/templates/book.html
index 7fdd308..41e6cb1 100644
--- a/scripts/templates/book.html
+++ b/scripts/templates/book.html
@@ -769,7 +769,7 @@
 				Marina Gracia, Gijs de Heij, Ana Isabel Garrido Mártinez, Alfredo Calosci, Daniel Arribas Hedo.</li>
 		</ul>
 		<p>La copia de este libro es única y el tiraje es por definición infinito.<br>
-			Esta copia es el número XXX de copias descargadas.<br> <!-- VOEG NUMMER KOPIJ TOE-->
+			Esta copia es el número {{ edition_count }} de copias descargadas.<br>
 			Condiciones colectivas de (re)uso (CC4r), 2021<br>Copyleft con una diferencia: Se le
 			invita a copiar, distribuir y modificar esta obra bajo los términos de la <a
 				href="https://gitlab.constantvzw.org/unbound/cc4r">CC4r</a>.</p>
diff --git a/scripts/templates/book_en.html b/scripts/templates/book_en.html
index 4c11a3c..906832a 100644
--- a/scripts/templates/book_en.html
+++ b/scripts/templates/book_en.html
@@ -570,7 +570,7 @@
 		<li>the human beings Emilia Pardo Bazán, Benito Pérez Gáldos, Jaime Munárriz, Luis Morell, An Mertens, Eva Marina Gracia, Gijs de Heij, Ana Isabel Garrido Mártinez, Alfredo Calosci, Daniel Arribas Hedo.</li>
 		</ul>
 		<p>The copy of this book is unique and the print run is by definition infinite.<br>
-			This copy is the XXX number of copies downloaded.  </p> <!-- VOEG NUMMER KOPIJ TOE-->
+			This copy is the {{ edition_count }} number of copies downloaded.  </p>
 		<p>Collective terms of (re)use (CC4r), 2021<br>Copyleft with a difference: You are invited to copy, distribute, and modify this work under the terms of the work under the terms of the <a href="https://gitlab.constantvzw.org/unbound/cc4r">CC4r</a>.</p>
 	</section>