gnuboardm\theme\basic\skin\qa\basic\write.skin.php

<input type="text" name="qa_hp" value="<?php echo get_text($write['qa_hp']); ?>" id="qa_hp" <?php echo $req_hp; ?> class="<?php echo $req_hp.' '; ?>frm_input full_input" size="30" placeholder="휴대폰">

<input type="text" name="qa_hp" value="<?php echo get_text($write['qa_hp']); ?>" id="qa_hp" <?php echo $req_hp; ?> class="<?php echo $req_hp.' '; ?>frm_input full_input" size="30" placeholder="<?php e__('Mobile phone'); ?>">