[config, i18n] Create default translation mechanism for all supported languages. Mostly usefull in test where language are never initialised from .po files. This is a reapplication of changeset 1a423eaee782 backouted by b9ffecd0316a with an additional fix not to break i18nxxx commands

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$