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There is a trash inside close tags (perhaps not only), such as: </em> (</ em>), </strong> (</ strong>), </tt> (</ tt>), </i> (</ i>), </p> (</ p>). Sometimes this issue can be viewable on adminpanel pages.
Affected CMSMS versions: 1.9.2 and newer, including 1.10-beta2.
Affected modules are (may be more):

\admin\lang\ext\en_CY\admin.inc.php
\admin\lang\ext\fr_FR\admin.inc.php
\admin\lang\ext\nb_NO\admin.inc.php
\install\lang\ext\en_CY.php
\install\lang\ext\pt_PT.php
\install\lang\ext\ru_RU.php
\modules\CMSMailer\lang\ext\en_CY.php
\modules\MenuManager\lang\ext\ar_AR.php
\modules\MenuManager\lang\ext\en_CY.php
\modules\MicroTiny\lang\ext\en_CY.php
\modules\News\lang\ext\nl_NL.php
\modules\News\lang\ext\sv_SE.php
\modules\Search\lang\ext\ru_RU.php
\modules\ThemeManager\lang\ext\ru_RU.php