Languages single breaks on PHP version 8.2

[bogreudell]

The following variables are the problem:

$lexicons = array_merge($lexicon_source, $lexicon_target);
$lexicons_count = count($lexicons);

It may be because $lexicon_source and $lexicon_target are not treated as arrays when empty, breaking array_merge

Is there a better way to write this to account for the possibility of an empty variable?