How to change 'sidebar' in off-canvas

I've tried with two options provided in the forum and it doesn't work for me:

Try opening file: root/language/xx-XX/xx-XX.tpl_ja_mood.ini and add this language text: TPL_SIDE_BAR = "your_own_text_translation_here"

For example, in English, it’s declared in this: root/language/en-GB/en-GB.tpl_ja_mood.ini
TPL_SIDE_BAR = "Sidebar"

I've changed the parameter here but it doesn't work

Opening the off-canvas.php file i found this
<h2 class="t3-off-canvas-header-title"><?php echo JText::_('TPL_SIDE_BAR') ?></h2>
And here I really don't know how to manage the code.

Any other possibilities?

Regards,

You can share the credentials of your site: URL, Admin + FTP account, I will help you out.

saguaros Thanks! Finally I've made it work with an Override! Regards!