some english phrases are not in language file?

Indeed, these error messages are not translatable.

We'll change that for next version.

You can find them in the file administrator/components/com_hikashop/classes/payment.php

For the address, you need to change the line:
<?php echo $field->field_realname;?>
by:
<?php echo $this->fieldsClass->getFieldName($field->field_realname);?>
in the file form_address of the view order via the menu Display->Views and they will be translated automatically.

For the history type, you can just add the english word in uppercase in your translation file and it should work. For example:
CREATION="Creation"

The widget names can be changed by editing each widget.
There is no translation for them.

The payment method is actually not the name but the type. That's why it is in english. We'll look at changing that in the future but there is no easy way to change it for you.