OK, according to this
$link = $this->context->link; $my_account_urls = array( 2 => array( 'title' => $this->trans('Orders', array(), 'Admin.Global'), 'url' => $link->getPageLink('history', true), ), 3 => array( 'title' => $this->trans('Credit slips', array(), 'Modules.Customeraccountlinks.Admin'), 'url' => $link->getPageLink('order-slip', true), ), 4 => array( 'title' => $this->trans('Addresses', array(), 'Shop.Theme.Global'), 'url' => $link->getPageLink('addresses', true), ), 0 => array( 'title' => $this->trans('Personal info', array(), 'Modules.Customeraccountlinks.Admin'), 'url' => $link->getPageLink('identity', true), ), );
in modules->ps_customeraccountlinks->ps_customeraccountlinks.php, it says 'Addresses' should be in the 'Shop.Theme.Global' language file. I can see it at line 15 in ShopThemeGlobal.en-US.xlf, but it's not in ShopThemeGlobal.fi-FI.xlf (Finnish).
Any ideas how I can add this?