(Since 2.5)
Redefining front-end texts/language strings:
You can change the default texts for "Published on", "Previous posts", etc. (In 2.4 you could do it via gsconfig with the $nm_i18n array.)
Since 2.5 you can create/edit a component nm-init and use function nm_set_text, like:
<?php nm_set_text('PUBLISHED', 'Posted on: '); ?>
<?php nm_set_text('READ_MORE', 'Continue reading...'); ?>
... etc.
Full list of frontend strings
FOUND
NOT_FOUND
NOT_EXIST
NO_POSTS
PUBLISHED
TAGS
OLDER_POSTS
NEWER_POSTS
SEARCH
GO_BACK
ELLIPSIS
LOCALE
DATE_FORMAT