In index.php, it is impossible in Czech to glue together the two existing strings that form the main table column headings.

1) The 'modulnameplural' should not be capitalized for us.

2) The 'open' and 'closed' strings don't give proper sense if used with 'modulenameplural' at this place.

Proposed solution:

1) Two new strings

$string['closeddialogues'] = 'Closed dialogues';

$string['openeddialogues'] = 'Open dialogues';

2) Change in index.php

$stropendialogues = get_string(openeddialogues, dialogue);

$strcloseddialogues = get_string(closeddialogues, dialogue);