diff --git a/i18n/Readme.txt b/i18n/Readme.txt
index cbd24db..f92d735 100644
--- a/i18n/Readme.txt
+++ b/i18n/Readme.txt
@@ -1 +1,58 @@
-This directory contains various knowledge graphs needed to run regression tests
\ No newline at end of file
+These ontologies are an extraction and adaptation for internationalization of 
+https://github.com/vivo-project/sample-data/blob/main/sample-data.n3.
+
+Although they are of general use, the knowledge graphs and ontologies contained 
+in this directory are specifically designed to be used with the regression tests
+of https://github.com/vivo-community/vivo-regression-tests.
+
+The files are divided into two series: *-orig.ttl and *-i18n*.ttl and they 
+correspond respectively to a use in a first instance of VIVO 1.11 not 
+including internationalization and the VIVO 1.12 version 
+including internationalization (i18n)
+
+Data sheet of the files:
+- Semantics
+    The semantics of the two file categories are the same. For example the 
+    identification to the resource 'sample-data:n2022' refers to the concept of
+    "Keynote Speaker" in both ontology categories.
+
+- Base URI, sample-data prefix, individual base uri
+    Each ontology category has its own URI sets
+    
+    - ORIG Category
+        - base URI: http://localhost:8080/vivo_orig/sample-data-orig#
+        - prefix sample-data http://localhost:8080/vivo_orig/individual/
+        - Definition of the individual to be declared in the runtime.properties
+          file of the VIVO instance: 
+          Vitro.defaultNamespace = http://localhost:8080/vivo_orig/individual/
+        - Internationalization 
+          Only the en_US is available in this category
+
+    - I18N Category
+        - base URI: http://localhost:8080/vivo_i18n/sample-data-i18n#
+        - prefix sample-data http://localhost:8080/vivo_i18n/individual/
+        - Definition of the individual to be declared in the runtime.properties
+          file of the VIVO instance: 
+          Vitro.defaultNamespace = http://localhost:8080/vivo_i18n/individual/
+        - for each language a graph containing the linguistic context of each 
+          language in extension of the filename is available . For example, 
+          for fr_CA, the graph sample-data-i18n-fr_CA.ttl contains the 
+          Canadian-French translation of sample-data
+
+Sample Data Language Enhancement
+        To introduce a new linguistic context to the sample-data, perform the 
+        following steps:
+        
+            1- Choose the graph of an original language (e.g. en_US) and rename
+               it to the target language context (e.g. fr-BE). This gives for 
+               example sample-data-i18n-fr_BE.ttl
+            2- in the graph, replace the linguistic tag of the source language 
+               (ex.: "@en-US") by the linguistic tag of the target 
+               language (ex.: "@fr-BE")
+            3- Translate the rdfs:label content of each resource to the new 
+               liguistic context (e.g.: 
+                    sample-data:n1467 rdfs:label "Professor"@en-US . 
+                    by 
+                    sample-data:n1467 rdfs:label " Professeur"@en-BE ;
+                )
+-- End of text --
\ No newline at end of file
diff --git a/i18n/sample-data-orig.ttl b/i18n/sample-data-orig.ttl
index 3e791d0..5832f7e 100644
--- a/i18n/sample-data-orig.ttl
+++ b/i18n/sample-data-orig.ttl
@@ -1,16 +1,18 @@
-@prefix geo:   <http://aims.fao.org/aos/geopolitical.owl#> .
-@prefix :      <http://localhost:8080/vivo_i18n/sample-data-i18n#> .
-@prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
-@prefix owl:   <http://www.w3.org/2002/07/owl#> .
+# baseURI: http://localhost:8080/vivo_orig/sample-data-orig
+
+@prefix : <http://localhost:8080/vivo_orig/sample-data-orig#> .
+@prefix bibo: <http://purl.org/ontology/bibo/> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix geo: <http://aims.fao.org/aos/geopolitical.owl#> .
+@prefix obo: <http://purl.obolibrary.org/obo/> .
+@prefix owl: <http://www.w3.org/2002/07/owl#> .
+@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix sample-data: <http://localhost:8080/vivo_orig/individual/> .
-@prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .
-@prefix skos:  <http://www.w3.org/2004/02/skos/core#> .
-@prefix bibo:  <http://purl.org/ontology/bibo/> .
-@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
-@prefix vivo:  <http://vivoweb.org/ontology/core#> .
+@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
-@prefix obo:   <http://purl.obolibrary.org/obo/> .
-@prefix foaf:  <http://xmlns.com/foaf/0.1/> .
+@prefix vivo: <http://vivoweb.org/ontology/core#> .
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
 
 sample-data:n2022  a           vivo:PresenterRole ;
         rdfs:label             "Keynote Speaker"@en-US ;