diff --git a/Makefile b/Makefile
index 3efbcc2a5..37ec87c53 100644
--- a/Makefile
+++ b/Makefile
@@ -70,8 +70,7 @@ CFLAGS = -Wall -Wextra -mtune=native -O2 -s
 all: swad_ca swad_de swad_en swad_es swad_fr swad_gn swad_it swad_pl swad_pt
 
 swad_ca: $(OBJS) $(SOAPOBJS) $(SHAOBJS)
-	$(CC) $(CFLAGS) -c -D L=1 swad_help_URL.c
-	$(CC) $(CFLAGS) -c -D L=1 swad_text.c
+	$(CC) $(CFLAGS) -c -D L=1 swad_help_URL.c swad_text.c
 	$(CC) $(CFLAGS) -o $@ $(OBJS) swad_help_URL.o swad_text.o $(SOAPOBJS) $(SHAOBJS) $(LIBS)
 	chmod a+x $@
 
diff --git a/swad_changelog.h b/swad_changelog.h
index 602ee286b..9d5d26c73 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -209,13 +209,14 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 16.161.5 (2017-03-23)"
+#define Log_PLATFORM_VERSION	"SWAD 16.161.6 (2017-03-23)"
 #define CSS_FILE		"swad16.161.css"
 #define JS_FILE			"swad16.144.js"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*?.h sql/swad*.sql | tail -1
 /*
+        Version 16.161.6: Mar 23, 2017	Some help URLs translated to spanish. (217384 lines)
         Version 16.161.5: Mar 23, 2017	Some help URLs translated to spanish. (217383 lines)
         Version 16.161.4: Mar 22, 2017	Some help URLs translated to spanish. (217381 lines)
         Version 16.161.3: Mar 22, 2017	Some help URLs translated to spanish. (217381 lines)
diff --git a/swad_duplicate.c b/swad_duplicate.c
index 6266090d3..9d50fbc77 100644
--- a/swad_duplicate.c
+++ b/swad_duplicate.c
@@ -248,7 +248,7 @@ void Dup_GetUsrCodAndListSimilarUsrs (void)
 
 static void Dup_ListSimilarUsrs (void)
   {
-   extern const char *Hlp_USERS_Duplicates_possibly_similar_users;
+   extern const char *Hlp_USERS_Duplicates_similar_users;
    extern const char *Txt_Similar_users;
    struct UsrData UsrDat;
    char Query[512];
@@ -259,7 +259,7 @@ static void Dup_ListSimilarUsrs (void)
 
    /***** Start frame with list of possible duplicate users *****/
    Lay_StartRoundFrame (NULL,Txt_Similar_users,
-                        NULL,Hlp_USERS_Duplicates_possibly_similar_users);
+                        NULL,Hlp_USERS_Duplicates_similar_users);
 
    /***** Build query *****/
    if (Gbl.Usrs.Other.UsrDat.Surname1[0] &&
diff --git a/swad_help_URL.c b/swad_help_URL.c
index ec9c8766a..8557ed132 100644
--- a/swad_help_URL.c
+++ b/swad_help_URL.c
@@ -1252,7 +1252,7 @@ const char *Hlp_USERS_Groups =
 #elif L==3
 	"USERS.Groups";
 #elif L==4
-	"USERS.Groups";
+	"USERS.Groups.es";
 #elif L==5
 	"USERS.Groups";
 #elif L==6
@@ -1504,7 +1504,7 @@ const char *Hlp_USERS_Duplicates_possibly_duplicate_users =
 #elif L==3
 	"USERS.Duplicates#possibly-duplicate-users";
 #elif L==4
-	"USERS.Duplicates#possibly-duplicate-users";
+	"USERS.Duplicates.es#usuarios-posiblemente-duplicados";
 #elif L==5
 	"USERS.Duplicates#possibly-duplicate-users";
 #elif L==6
@@ -1517,7 +1517,7 @@ const char *Hlp_USERS_Duplicates_possibly_duplicate_users =
 	"USERS.Duplicates#possibly-duplicate-users";
 #endif
 
-const char *Hlp_USERS_Duplicates_possibly_similar_users =
+const char *Hlp_USERS_Duplicates_similar_users =
 #if   L==1
 	"USERS.Duplicates#similar-users";
 #elif L==2
@@ -1525,7 +1525,7 @@ const char *Hlp_USERS_Duplicates_possibly_similar_users =
 #elif L==3
 	"USERS.Duplicates#similar-users";
 #elif L==4
-	"USERS.Duplicates#similar-users";
+	"USERS.Duplicates.es#usuarios-similares";
 #elif L==5
 	"USERS.Duplicates#similar-users";
 #elif L==6
diff --git a/swad_text.c b/swad_text.c
index 3d5950bae..1ef6da7ae 100644
--- a/swad_text.c
+++ b/swad_text.c
@@ -26236,11 +26236,11 @@ const char *Txt_Not_duplicated =
 #elif L==3
 	"Not duplicated";
 #elif L==4
-	"No es duplicado";
+	"No es duplicado/a";
 #elif L==5
 	"Pas dupliqué";
 #elif L==6
-	"No es duplicado";		// Okoteve traducción
+	"No es duplicado/a";		// Okoteve traducción
 #elif L==7
 	"Non duplicato";
 #elif L==8