Update message for :python/:py3 usage with approximate translations.
diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index dd85914..56faa68 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -30,8 +30,6 @@
 							*known-bugs*
 -------------------- Known bugs and current work -----------------------
 
-Patch for :python + :py3. (James Vega, Roland Puntaier, 2010 Aug 12)
-
 Patch for crash with cmdline editing functions. (Dominique Pelle, 2010 Aug 12)
 
 Have a close look at :find completion, anything that could be wrong?
diff --git a/src/po/eo.po b/src/po/eo.po
index e1dff7f..0da75bd 100644
--- a/src/po/eo.po
+++ b/src/po/eo.po
@@ -2608,8 +2608,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "nepermesita en sabloludejo de Vim"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Pitono: Ne eblas uzi :py kaj :py3 en la sama seanco"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Pitono: Ne eblas uzi :py kaj :py3 en la sama seanco"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Pitono: Ne eblas uzi :py kaj :py3 en la sama seanco"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/fi.po b/src/po/fi.po
index 62ecf5d..6a2a69a 100644
--- a/src/po/fi.po
+++ b/src/po/fi.po
@@ -2603,8 +2603,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "ei sallittu Vimin hiekkalaatikossa"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python: Ei voi käyttää komentoja :py ja :py3 samassa istunnossa"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python: Ei voi käyttää komentoja :py ja :py3 samassa istunnossa"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python: Ei voi käyttää komentoja :py ja :py3 samassa istunnossa"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/fr.po b/src/po/fr.po
index b5b9f24..9d5035a 100644
--- a/src/po/fr.po
+++ b/src/po/fr.po
@@ -2827,8 +2827,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "non autorisé dans le bac à sable"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python : impossible d'utiliser :py et :py3 dans la même session"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python : impossible d'utiliser :py et :py3 dans la même session"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python : impossible d'utiliser :py et :py3 dans la même session"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/it.po b/src/po/it.po
index 4026f99..baf7231 100644
--- a/src/po/it.po
+++ b/src/po/it.po
@@ -2604,8 +2604,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "non ammesso in ambiente protetto"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python: Impossibile usare :py e :py3 nella stessa sessione"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python: Impossibile usare :py e :py3 nella stessa sessione"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python: Impossibile usare :py e :py3 nella stessa sessione"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/pl.UTF-8.po b/src/po/pl.UTF-8.po
index 0d56e99..facbd14 100644
--- a/src/po/pl.UTF-8.po
+++ b/src/po/pl.UTF-8.po
@@ -2585,8 +2585,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "Niedozwolone w piaskownicy Vima"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python: nie można używać :py i :py3 w czasie jednej sesji"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python: nie można używać :py i :py3 w czasie jednej sesji"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python: nie można używać :py i :py3 w czasie jednej sesji"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/pl.cp1250.po b/src/po/pl.cp1250.po
index 77bf351..b5f649a 100644
--- a/src/po/pl.cp1250.po
+++ b/src/po/pl.cp1250.po
@@ -2585,8 +2585,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "Niedozwolone w piaskownicy Vima"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python: nie mo¿na u¿ywaæ :py i :py3 w czasie jednej sesji"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python: nie mo¿na u¿ywaæ :py i :py3 w czasie jednej sesji"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python: nie mo¿na u¿ywaæ :py i :py3 w czasie jednej sesji"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/pl.po b/src/po/pl.po
index 64717c5..30ed4dc 100644
--- a/src/po/pl.po
+++ b/src/po/pl.po
@@ -2585,8 +2585,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "Niedozwolone w piaskownicy Vima"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python: nie mo¿na u¿ywaæ :py i :py3 w czasie jednej sesji"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python: nie mo¿na u¿ywaæ :py i :py3 w czasie jednej sesji"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python: nie mo¿na u¿ywaæ :py i :py3 w czasie jednej sesji"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/sk.cp1250.po b/src/po/sk.cp1250.po
index 201ef07..bc1efda 100644
--- a/src/po/sk.cp1250.po
+++ b/src/po/sk.cp1250.po
@@ -4791,8 +4791,8 @@
 
 #. This should have been checked when generating the .spl
 #. * file.
-msgid "E999: duplicate char in MAP entry"
-msgstr "E999: duplicitný znak v MAP položke"
+msgid "E783: duplicate char in MAP entry"
+msgstr "E783: duplicitný znak v MAP položke"
 
 #, c-format
 msgid "E390: Illegal argument: %s"
diff --git a/src/po/sk.po b/src/po/sk.po
index 52172f4..b59b014 100644
--- a/src/po/sk.po
+++ b/src/po/sk.po
@@ -4791,8 +4791,8 @@
 
 #. This should have been checked when generating the .spl
 #. * file.
-msgid "E999: duplicate char in MAP entry"
-msgstr "E999: duplicitný znak v MAP polo¾ke"
+msgid "E783: duplicate char in MAP entry"
+msgstr "E783: duplicitný znak v MAP polo¾ke"
 
 #, c-format
 msgid "E390: Illegal argument: %s"
diff --git a/src/po/uk.cp1251.po b/src/po/uk.cp1251.po
index 8ddfd26..8516458 100644
--- a/src/po/uk.cp1251.po
+++ b/src/po/uk.cp1251.po
@@ -2649,8 +2649,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "íå äîçâîëåíî ó ï³ñî÷íèö³ Vim"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python: Íå ìîæíà âèêîðèñòàòè :py ³ :py3 â îäíîìó ñåàíñ³"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python: Íå ìîæíà âèêîðèñòàòè :py ³ :py3 â îäíîìó ñåàíñ³"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python: Íå ìîæíà âèêîðèñòàòè :py ³ :py3 â îäíîìó ñåàíñ³"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "
diff --git a/src/po/uk.po b/src/po/uk.po
index 7880506..fb624e7 100644
--- a/src/po/uk.po
+++ b/src/po/uk.po
@@ -2649,8 +2649,11 @@
 msgid "not allowed in the Vim sandbox"
 msgstr "не дозволено у пісочниці Vim"
 
-msgid "E999: Python: Cannot use :py and :py3 in one session"
-msgstr "E999: Python: Не можна використати :py і :py3 в одному сеансі"
+msgid "E836: This Vim cannot execute :python after using :py3"
+msgstr "E836: Python: Не можна використати :py і :py3 в одному сеансі"
+
+msgid "E837: This Vim cannot execute :py3 after using :python"
+msgstr "E837: Python: Не можна використати :py і :py3 в одному сеансі"
 
 msgid ""
 "E263: Sorry, this command is disabled, the Python library could not be "